aaaaah... this has been a major headache and frustration for me for years now! Why is there no quality, professional grade, live performance keyboard controller out there!!!??? I have to assume that the semi pro home recording market absolutely crushes the performing musician market... as the home recording world seems to be what all these controllers are designed for.
I had really high hopes for the Keylab... in theory, it seemed to be most of what I could have hoped for... solid road worthy build (wow, wood (faux wood anyways) sides), actual full size keys, full complement of controls...pots, faders and buttons (2 banks moreover). Unfortunately, the build was atrociously bad. I myself experienced a fader which would not send the full range of MIDI info, the replacement had a key pop up after minimal usage. And when you pushed the mod wheel a little hard it would get stuck at the end of its travel, then needing a lot of force to move it again (unacceptable of course during performance). What made all of this even worse was that trying to get help and support from Arturia was frustrating beyond words. And of course, a simple google search or search through this forum reveals way too many stories just like mine.
Beyond that, there were some real misses and poor design. I thought the keybed was really poor. And when you applied pressure, the keys actually feel like they are bowing or bending. Speaking of pressure, the aftertouch actually took about 1/2 second of applying pressure before actually sending the after touch MIDI info... totally bizarre and making the after touch unusable. Here's another weird one... when you put a button in toggle mode, it would light when you pressed it and the light would go out when you released it...which would make sense for momentary mode, but of course in toggle mode it should light after you press and release and go out when you next press and release..like on/off.
And I agree with all the other above assessments of other controller options.. just nothing out there that has it all together..poor keybeds, lack of physical controllers. etc. I am using SL MKII 49 and I'm actually pretty happy with it, except for the unforgivable sin of only having 8 faders...as I use them quite a bit as B3 drawbars. A few other quibbles, like the display is impossible to see from a sitting position, you need to be standing over it and there is no contrast control or way to adjust. Also (and I don't actually know the exact measurement of "full size keys") but these are smaller than the Keylab but it really doesn't bother me too much. The Roland A500 Pro,which is also sitting on the shelf with the Keylab, had very noticeably smaller keys. Man, the Behringer really seems to have some good design ideas, but I just cannot buy a Behringer keyboard and jsut doubt it will fulfill its promise
I love how the Roland RD2000 implements its controllers..all the pots are endless rotary with LEDs encircling them and the faders also have LEDs... which of course makes it easy to see on stage, but also allows you to see what the actual software values are when they are different from the physical position of the controller. An ideal a controller would have plenty of actual physical controllers implemented just like those on the RD2000, or motorized like the Behringer...(including 9 faders, must I really have to say this to a keyboard designer when they are including faders?), full size keys, road and stage worthy design and build, two way communication like Novation's Automap. Really doesn't seem like a lot to ask.