I couldn't recommend them enough... When I got rear-ended in my MR2 in July, it really showed how stand-up they were in making the whole process so easy, fast, and headache-free... And the agreed-value coverage is the only way to go for classic cars that have real market value that is higher than what "book" value would show. Instead of $500 or whatever my '86 MR2 was valued at KBB or even worse, at wholesale-- they paid me the total amount of agreed value that I told them when I first put it on their insurance. That allowed me to get a replacement car without shelling out extra money, which is exactly what insurance is supposed to do in the first place. On top of that (being my first accident since I got my license 25+ years ago), it was such a fast and smooth process for me to get the check, get my medical expenses reimbursed, etc. and very patient walking me through my options and answering my questions during the claims process... You can choose any shop you want to do repairs (my estimate from 2 different places was still too high for them to fix it, so it was totaled).
Only caveat is that you need a daily driver insured to you, as the classic cars cannot be daily drivers. However, they don't put any mileage restrictions or use restrictions on your car (unlike other classic car insurance providers) which is a huge plus. Obviously, if you're putting 12,000 miles a year on your classic car, they are going to scratch their head and give you a call...
Josh, totally look into it... I believe I'm paying something like $350/year on my Celica for $0 deductible comp/collision/glass-- full coverage with agreed value.