hi fellow BCR user
here's a rather long sumary of my issues and troubles with the BCR:
ok, so firstly, i discovered that the bcr can't be used with Live's MIDI control output. on my unit, it causes the knobs to react much slower than when it's disconnected, i often get 2 LEDs to lit instead of 1 (i guess because of some feedback).
anyhow, it seems to be a L4 malfunction, so hopefully will be fixed soon.
my other worry was linked to the fact that each of my song is on a different live set, and bcr presets can't be remotely controled, and i don't want to have to change the preset according to a song during a live performance (staying with presets would also mean i'm limited to 32 songs).
so i decided that i would use one single preset, that would be the same for all songs. it's mainly CCs everywhere (i'll get back to it). the only trouble i have, is that there's no way to make the BCR recall its initial values automaticaly (maybe linked to the output bug?). and as there's no soft takeover in live, if i leave the knobs in their current position, when i'll touch them, it will bet a big mess. so my workaround is to have a MIDI channel in Live with it's MIDI OUT to the BCR, and on the first scene, a clip with all the CCs values set to the song's initial values (trough the enveloppe). so when i start the song, i'll see all the leds going to their initial values 'virtualy'.
another thing that annoys me, is that when you do such a thing, you see the knobs moving, but this doesn't change the parameter's value in Live. let me take an example: in one of my songs, i play with a cutoff freq, and when it's low, i start playing some Rhodes. i go through different scenes with a MIDI pedal control, and then at the end of my solo, i'm supposed to launch a scene where the cutoff freq sould be high but as i don't have any free hands to set it up, i don't know what to do. i can't either set it with enveloppe automation in Live, since the env sends relative values.
so my question is: how to make Live make the BCR send some control values without me touching anything (but a scene launch button)
and finaly, a little trick about the row of buttons: if you want them to lit when they're ON (like lit when a track is muted or when an effect is on), choose "2's comp" for the behaviour of the controler in Live.
last but not least: if someone can find a way to use one of these buttons to launch the recording of a clip AND have it lit when it's recording, let me know!
i hope i wasn't too annoying, just wanted to let you know my own experience with this machine that's really good, cheap, and makes L4 even more exciting to use (more of my tips to come soon).
well, and support is = 0! but in general it's the best you get for that money. I'd love to design the perfect controller for them at the same price 
travelling without moving (dune, my fav film!) 