Alesis Vortex Wireless by DJKeys
I ordered one of these when they were first announced. I have had three other keytars (KX-5 which I still have, AX-7 and AX-Synth). The size and price of this were the selling points for me. The AX Synth had a weak synth engine and the AX-7 was user-hostile. The KX-5 was the best, but it has intermittent problems, and is 25 years old, so it would cost more to fix than it is worth.
The Vortex is a very flexible controller. There are three pitch-ribbon buttons, each of which can be programmed to send different messages when the ribbon is touched. The ribbon also has a return or latch mode which is cool. It has octave, sustain, pitch wheel (only does pitch, hard to get used to), Three pr0grammable knobs and 8 pads that can send notes, cc messages, or patch changes. The accelerometer is actually very cool, as it is programmable and the range of motion is also controllable for amount of effect. The controls are ergonomic and easy to reach. The AX Synth neck was too fat for my fingers.
The downside of this unit is that the documentation is very poor. I was tearing my hair out trying to figure out the programming and finally found someone on line who had spent hours and finally figured out how to do it. I called him and he walked me through it. The documentation is incomplete, obtuse, and in some cases misleading.
There is no software for programming the unit, no way to dump the contents of your work into a computer file, and so far, very little online. Alesis really needs to address this, and if they do, they will sell a lot of these.
There HAS to be a way to save the config of the unit because no one wants to go through the effort and have no backup.
They are so inexpensive that you can beat it up, paint it, mod it and not worry.