On one hand, every new pinball is fun initially. But I also just got Oktoberfest after waffling on it for 3 years so I think the comparison is interesting... In my opinion, both games are fantastic and you can really tell how much love went into making both of them, but they also feel like opposites in many ways.
TS4 oozes polish and flow and has a strong Bally-Williams feel. With my first glance at the TS4 playfield, I saw too much plastic and many of the interesting mechs are flat or underneath the playfield. The game shoots a lot like Wonka (maybe too much tbd) and this means it's a fantastic shooter. I was worried about the music and theme getting old fast but I really like what they've done with TS4.
Meanwhile, Oktoberfest looks (and it is...) packed with a ton of visible 'mechs', huge variety of modes, and lots of ideas and depth. The Oktoberfest theme bugged me when it launched but they've improved it (the sound presentation in particular) a lot. But the overall 'presentation' truly pales in comparison to what JJP accomplishes with their software and A/V people. As a community, I think we massively over-value bill of materials and under-value the contribution of software teams to the fun-factor. That said, TS4 really should have had an additional uber-mech that defined it. The ramp and posts are very cool, but not enough IMHO.
TS4 is gorgeous and fun and I'm glad I bought it. I'm willing to spend money (or "lose money" for the flippers and pin-vestors...) on the hobby I love. And while the high cost of TS4 did indeed bother me very much, I see the value of JJP/TS4 over recent Stern games. It costs more and it should.
I have a larger game collection than most. TS4 is NOT as easy as most people claim and I love the rules design so far. I definitely prefer 'progression-style' rules flow and being able to see the 'all the stuff' in a game occasionally.
So I don't think my take varies much from others. The high price of all pins today sucks, TS4 is really fun, it's beautiful, and before the release, we all dreamed of an animatronic Buzz or Woody provided by Disney Imagineering.