Once you ignore the price, and code, and quality, and issues, and cheap manufacturing and cheap parts, bad design... then rate BM66? That is a tough ask, because all of those factors go into a rating. When I play it, I'm still shocked by the pricing of it. This wasn't pricing by the market (rare game that everyone wants), it was pricing by Stern. And even playing the Premium the number in my head is $15k.
But putting all that aside, it is an ok game. It follows that sparse playfield thing Stern does now. Long shots at the back with some targets in the middle sides you just hit randomly on bounces. The code is generic right now, but we have seen Lyman do cool things with generic code. On location I find it a great game to dump tokens into, but I don't want to own one even though I'm right in the correct demographic. Stern has much better games out there. And the turntable seems clunky. Metallica doesn't have much more in it, yet it seems miles more fun. AS is much more fun, TWD, ST, so many fun games. BM66 just doesn't stack up in that light. It's better than the 2k Stern games (NASCAR, RCT...), but nowhere near as good as the good Stern games (MET, ST, LOTR, IM, Tron, AS, TWD, AC/DC...).