I have the 2204A and can second the recommendation. Really good bang for the buck (120EUR here in Germany, including two probes), very compact and robust. Of co

I have the 2204A and can second the recommendation. Really good bang for the buck (120EUR here in Germany, including two probes), very compact and robust. Of course, with 10MHz you shouldn't expect too much, but for looking at low-speed communication it is perfectly OK. What I really enjoy are the many different trigger options (and they actually work). When buying an USB scope one must remember that it is nothing without the software, and the one from Picotech is well done. They also support Linux although that one is still in Beta and still has less features, but they say they are working on feature parity. It's not (F)OSS, though.