I have had a little time to use these now on bass & guitar, and wow these have got to be one of the most comfortable picks I have used to date, they are easy to grip/hold and make playing so much easier (If you have smaller hands or fingers you may not find these as comfortable). The picks do feel very well made and seem like they won't wear too quickly.
In all I really would suggest these to anyone who is looking to try something different (reason behind me trying them), I don't feel like there are any cons to these picks however, this is just my opinion.
Thomann was great as usual quick postage with no hassle, will be coming back.