Thanks David,
I like the Micro BR as a recorder but as with everything it's not perfect. On the plus side it records really well with no noise or latency issues and is for the most part pretty intuitive to use it's basic functions.
Where it falls down slightly is on the guitar modeling side, it has the exact same COSM modeling as my old BR532 that I bought about 8 years ago so it's not exactly the newest version of Boss modeling technology. For any serious recording I'd need to run it through my POD first which is fine but it takes away the whole portability aspect. The modeling sounds are fine though for practice and playing along with mp3's.
For vocals and acoustic instruments it's really good though (no modeling required), especially if you buy one of these ridiculously cheap Sony stereo condenser Mic's from ebay:
http://cgi.ebay.com/For-SONY-ecm-ds...4|66:2|65:12|39:1|240:1318|301:1|293:1|294:50
Also one of the main attractions for me with the Micro BR is that there's a pretty vibrant online community, so getting advice and support is pretty easy.
http://microrecorders.org/community/index.php
I also like the fact that you an save individual tracks as WAV or mp3 and copy them to your PC to import into Audacity, Reaper, Cubase your software of choice. So I tend to use it as a scratch plate for getting ideas together, then when I find something I like I copy the tracks to my PC and sequence it together.
Overall it's a useful device but it doesn't give you anything that you probably don't already have on your PC so really it's a question of how important portability is for you. I'd give it a 7/10.
Hope this helps
