Sadly, I know from personal experience that Heritage Insurance is fantastic! Here's why:
This Series II bass was destroyed when it inexplicably fell off a guitar stand and was decapitated. Thankfully, the bass was insured with Heritage! After wrestling with the decision about how to fix this mess, Heritage made it easy - they decided to total the bass, since the estimated repair cost plus expected depreciation (which is covered by my policy) was close to replacement value. Plus, since the repair would have involved placing a new scarf joint - glue joint - between the nut and the bridge, the whole sonic point of a neck-through bass with ebony neck laminates would have been diminished, if not lost. All they requested was that Alembic provide a letter stating that a repair could not fully restore the instrument to its original condition, and within a month I had a check in hand for the full insured value of the bass.
How cool is that?
Also, Heritage covers all kinds of loss to insured instruments - theft, accidental damage, loss or damage in shipping, you name it. Their coverage applies whether or not your instrument is used for paid gigs, and wherever the loss or damage might occur. Because Heritage specializes in musical instrument insurance they understand the unique issues involved, and they are very easy to deal with.
IMHO Heritage is the best. Whether you use Heritage or not, don't simply assume that your homeowner's insurance or renter's insurance covers your instruments. Many such policies have exclusions for instruments used on paid gigs, or when the loss occurs outside of one's home.
Take it from me: insure your gear!
(Message edited by s_wood on May 11, 2012)