I began using the butterfly picks 3 weeks ago and have found them to have
a great tone.
I did, however, find that they either slid a bit on my finger and did not
feel quite stable........
Get some cloth (not paper) tape from the drug store.. like 3M Durapore.
Whatever width you can get, cut 1/4 inch strips about 4 inches long.
Put on the picks, and wrap this tape around the last joint of your finger..
over the nail and around.
This keeps the pick from sliding and gives it a stable feeling.