Anybody use a near field or portable digital recorder?

[lex666]

Like this one by Zoom:
http://www.samash.com/catalog/showitem.asp?SKU=ZH2XXXXXX&cm_sp=HOMEPAGE-_-020808-_-HOMEPAGE+Side2

Or this one by Sony?
http://www.samash.com/catalog/showi...=Department&GroupCode=&categorysubsearch=true

how well does one perfom for recording guitar?