Quoted from twenty84:

I have a WOZ 75 RR (new buffered boards) and a Hobbit SE. WOZ had probably been about the most trouble free game Ive had, that said the one repair was a bad light board that was replaced under warranty. My Hobbit had an issue where all light the lights would freeze up (i.e. the lights would stop changing color and just get stuck in one state). This was fixed only after all the light boards and the cables between them were replaced (also under warranty). Thus my experience was the Hobbit lighting was much more problematic, although my Hobbit issue is a very rare one and in both cases JJP was very helpful in sending out parts at their cost. One major disadvantage of the daisy chain system in WOZ is that if one board fails it will effect all the down stream lights. This can be fixed by bypassing the broken board and changing the settings to let the system know that board was removed.

Quoted from JY64:

If you are looking for a first pin no do not buy a WOZ. For the money you can buy 2 or three W/B 90s games that are far better for a first time buyer.You will hear WOZ fans tell you how deep the game is but because of that you will never see much of WOZ

Quoted from JY64:

I never said you had to spend money like a sailor on leave for a first game a JY or Terminator 2 could be had for the price of a WOZ

Quoted from lordloss:

One thing I'd look out for is the 2.0 light boards. These are non serial, the latest updated, and the biggest selling point to buy (and even resell your machine down the line)

Quoted from Radius118:

They are not fine.. They will never be fine... Perhaps they will work for several years. If they haven't failed, they *will* fail sometime down the road. With enough "on" time and play time, they will fail. Count on it. Plan on it. This is why JJP needs to come out with an update kit to update all of the older lamp board systems to the new 2.0 system.
I have also talked to LTG about this before I bought my standard. There are too many revisions of lamp boards to make a blanket statement that they are fine. LTG hasn't had any problems with his 7.5v buffered boards. Excellent for LTG. LOTS of other people have had lamp boards that are most definitely NOT fine.
Sure, one guy may have posted issues with 2.0 system, but it's not a continuously recurring trend with Hobbit games.
If you were to go buy a GB, your first question would be whether there was any insert ghosting or clearcoat issues.
When people who are informed go to buy a Woz the first question is about the lamp boards - among other issues the game has had.
I literally just got off the phone with JJP to order a couple of spare single LED boards since they seem to fail quite frequently - at least for me. $25 each. That's $25 to replace a *light bulb*
What happens when you can't buy them anymore? Do you think JJP is going to keep making them now that they have abandoned that system? I don't think so. Eventually there won't be any more to buy and then what?
I have said it many times, and I will say it again. JJP needs to introduce an update kit to update older serial lamp board systems to the parallel 2.0 system.

Quoted from capguntrooper:

If it worries you all so badly that parts will not be able to be made in a few years then at $1,000 a pop I will start making them or some other company will. No need to "THE SKY IS FALLING" rant and rave over something that will most likely never happen.... all I am saying is, enjoy your WOZ.
P.S. When your WOZ fails to boot up one day, its more than likely your PCB cell battery died and needs replacing, begin rant on why JJP uses "disposable" batteries.

Quoted from Nokoro:

This whole discussion reminds me of when I was a kid and bought The Legend of Zelda cartridge for the NES. It was somewhat revolutionary at the time because it used a battery to save your progress instead of a password like other games (e.g., Metroid). I remember when I learned that the battery only had a 5 year life that I expressed frustration to my father. He laughed at me and said that I wouldn't be playing in 5 years anyway. Sure enough, after a few months, I had conquered both the main and secondary quests multiple times and moved on to other games. Later in life, I was able to download the original The Legend of Zelda and play again. People's feelings change, and technology has a way of making things happen.
Right now, I say WOZ will never leave my collection, but I have no idea how I'll feel in 5 years. At some point, all versions of the boards will stop working and replacements will be needed. Someone will offer something. I was more concerned with the USB dongle that has an encrypted code that you need to run the software. I remember asking about it in another thread and wondering how the pin would function if that dongle stopped working and JJP was out of business. I believe Lloyd responded and said something like, "the pinball community is full of creative people." There are a ton of WOZs out there owned by home collectors that will be kept in pristine condition. It is one of the greatest machines. There will be demand for it in the future, and somehow, people will find a way to have replacement parts.

Quoted from merccat:

I think a lot of the concern is simply a natural part of a technology transition. We have moved from universally available bulbs available anywhere by a number of manufacturers to a specific proprietary board with (currently) a single source. Not that its a bad thing as there are lots of fantastic benifits gained from going this route.
Warranted or not, thats going to make some people uncomfortable as they see shifts in the design of those propetary boards.
It also goes to show how much people love and care about their WOZ's that they are looking forward to something that *might* break 10-20 years from now.
Edit:
Full Disclaimer: I'm in no way worried about the current or future state of my WOZ... i just think its an interesting convergence between tech trends and pinball.