First of all, thanks for the detailed and well elaborated post, rhatten, rep to you.
I don't want anyone to interpret this the wrong way, and I hope they won't - BeCue is AWESOME! I've had nothing but very polite and cordial conversations with the owner Alessandro, and I'm proud to say I was one of the first BeCue users in my part of the world.
I can only recommend everybody try BeCue and see if it's their cup of tea. I believe many will be happy with what they get.
The issues I had with the BeCue are the same issues that others have noticed - the taper on 5.1 is way too uncomfortable for me (I don't have particularly big hands) and the lack of smoothness just kills me. But the biggest hurdle was how energetic it was with the Ultraskin Hard tip it came with. Made a lot of my follow shots end up like stun run-troughs because the ball would not take the top spin soon enough. I'll concede that it was probably more a matter of how I should have adapted my technique to BeCue than anything else, BUT...
...BUT having said all this - I really like trying new equipment (I might be what people like to refer to as a 'pool cue whore'
), so it was just time for me to try some new stuff (enter Ex Pro). I didn't want to bother with changing the tip and trying it with a Soft tip (like I said, in my country it's a hassle getting the tip changed professionally, especially considering BeCue has that cork-like layer between the shaft and the tip), but that might have succeeded in reducing the energy somewhat.
Also, I didn't try the Prime shaft, even though I wanted to. But that's a different story.
All in all, I can definitely stand behind recommending BeCue to anybody who's interested in trying something completely new. It has a positively spectacular hit (especially at first, before the tip compresses and hardens), and if you can get past some of the quirks of it, I believe most people will find it very enjoyable. And Alessandro is a delight to work with.
I just want to try other things first before I settle on something for an extended period of time. I might just come back to BeCue at some point in the future, who knows.