They have an excellent reputation among Dahlia enthusiasts, I'm certain they'll perform beautifully for you! As iffy as tuber storage can be, its not surprising that there would be a lot of tubers of questionable quality on the market.
Looking forward to some gorgeous pictures!
Thinking about Dahlias got me looking through last years pictures- geez I can't wait for warm weather to get here to stay! I think this was my favorite Dahlia last year, I sure hope it has made it through winter storage!