Hi Rodos,
I've been using the R-09 for a while now, and i find it very useful, i bought the little tripod for it as well
I havnt yet attached any external mics - and i'm sure that you would get even better results with a quality external, but the internal mics are seemingly quite sensitive, and for recording speech its great.
I've also recorded guitars, audience noises, trains and the sea - mostly with very usable results. I cant compare wheter its more noisey/hissy than other models, and personaly thats no too much of a prob as i have the mighty osirisxp! yee har!
A couple of nice features on the unit are the lowcut swtich, it has "automatic gain control" which its not too bad at all - when recording speech its a great "set and forget" switch. you can also record in stereo/mono, to wav and mp3 of varying rates up to 24bit/48KHz or 320 kbps depending on how much recording time you want from the unit. For transfer to pc of mac it couldnt be easier...usb OR use the internal card in a card reader (SD i think, havnt used it).
There are a couple of things that i would complain about though (albeit very minor things) first, is that it just doesnt seem that sturdy, being housed in a light plastic, i would want it to be a little heavier, but thats just aesthetic. More importantly, where the batteries are housed (2 AAs) the unit has a rather flimsy opening, open it half way and you get access to the card and the usb port, but to change the batteries you have to slide a little catch and push to reveal the compartment. So long as you are careful this is not an issue, but i have felt wary when repalcing the batteries. Just something to look out for..
Hope thats a help.
Tom