I used to have one of the Bitscopes (the original "pocket" version - single channel + 8bit logic analyzer), but I have sold it after getting a Rigol 1052E for about the same price.
The Bitscope was way too big pain in the backside to use - the software liked to hang randomly, often taking Windows down with it (in Linux it just crashed the app), it needed obscure libraries (Kylix? That was obsolete like 10 years before I got the device already ...), it was buggy and you needed a computer on the bench. Also the performance is what you pay for - the 20MHz is pretty much theoretical bandwidth (40MHz sampling), a real, usable one is maybe around 5MHz tops. The multichannel Bitscopes divide the sampling rate by the number of channels in use, so it gets even worse.
All in all, unless you absolutely need a pocket device for field use and can live with the limitations, your money is better spent elsewhere.