Quoted from Ceemunkey:

I don't think we can hand-on-heart say it's been a reliable machine because although I'm sure there are lots of people who've never had an issue - there are many people who have had problems myself included - a small number have had serious issues yes, but nothing catastrophic for me just cables/connectors coming loose etc and one LED pcb not lighting up in the pop bumpers, so the machine has always been playable. PB sent me a replacement LED in under a week, and I know some guys who had to have new playfield IO boxes - again all received pretty quickly.
I think I'd say that currently, you may possibly have one or two issues out of the box and hopefully minor or superficial things that don't stop you playing it. BUT once any teething issues are over (IF you get any), it's fine, and I've said it before but mechanically speaking its a beast it just feels sooooo solid. The code does need a little bit of bug fixing because there is the odd lock up/freeze here and there. I haven't tried 2.7 yet maybe that's fixed some of these minor problems.
I'm so glad I picked up an LV it's a fantastic machine. In fact it's that good, I've found it hard to go back to anything else since I got it.