I've had my policy with MusicPro for about 18 months now; when Merz-Huber raised their deductible and minimum I looked elsewhere and found them. The rate I got from Merz-Huber was through my membership in the International Society of Bassists. Now, with MusicPro, I cover over $25K of stuff for around $220/yr.
However, I understand they are hard to get hold of these days, a contact told me they are overwhelmed. I sent in my renewal with changes about three weeks ago and haven't yet received confirmation and an updated coverage listing. My guess is that they are being flooded with applications and questions, as Musicians Friend is linking to them for insurance coverage.
MusicPro is in my Double Bass Links Page -
http://www.urbbob.com/basslink.html under MISC