I've got the BLUE Bottle with the B6 & B7 capsules and I can't think of anything I dislike about it. Of course its a great vocal mic, but last night I used to as one of four mics while recording an opera(!!!) (the Bottle was used as a center channel vocal spot in support of a stereo pair of Neumann KM184s)
The multiple capsules combined with the high quality electronics result in one of the most versatile mics around. Yeah its big and heavy, but so is the RCA 44; I've never run across any circumstances where its size/weight were a problem. The cost factor is a more "real" issue, but its a bargain compared to some of the comparable mics currently available. (the new Telefunken USA mics, for example)
Some random thoughts about pricing: A couple of years ago, when the exchange rate was working in our favor (USA), U87s were WAY under $2k and M149s were under $3k. At that time the Bottle was an expensive mic, but still well worth it IMO. But now with dealers gettting $4k for a M149 and nearly $3k for a U87w/shock, then the Bottle starts to look like a real bargain.
Forgetting silly things like money, the Bottle is one of the most flexible large D condensers available and in the right setting, on the right source, it can hang with the very best mics. And you can't ask for much more from a mic, at any price.