I just got my Jawbone 2 today and I am charging it right now! I originally had the Jawbone 1 and LOVED the sound quality and zero noise. My husband was going to get one as well but when we found out about the J2, he said he would get me the J2 and use my old J1.
One gripe with the J1 was that none of the included earbuds fit my small ears at all but I bought the Jabra replacement mini-gels and they fit great. The J1 round earbuds fit my husband's ears perfectly so I'm going to use the Jabra ear gels for my new J2.
The other gripe is that the charger isn't a universal mini-usb so you always have to have that specific cord with you instead of just the one multi-purpose charger for all your gadgets (we had one charger good for both our BB's and our moto H700's).
My J2 is done charging so after I pair it with my BB and try it out, I will update.