I have used H2 zoom. It's not utterly perfect for ALL things, but for price range, very good.
I have friend who has bigger more hi-fi brand, with all sorts of XLR input (for 2 microphones) etc. It is without doubt better for ultra hi-fi recordings, yet if you want to carry recorder in your pocket, and make recordings easily by simply pushing couple of buttons, then Zoom is most definitely better.
For loud sounds and big spaces, it may produce quite flat sound - which may or may not be possible to made sound better by mastering. But close range, tolerable level sounds - it can be very good. Field recordings, rehearsal recordings, saving sounds for later use (like synth, metal junk, etc).
Alchemy of the 21st Century CD all field recordings were made with H2, with no effects or mastering of any kind.