Wonderful...I got the 15 because I have tried 12's before and the B string just won't cut it. I haven't tried good 12s or 10s. That is one reason I was thinking of getting an amp head with a separate cab. I thought I may have better control with the head and say a 210 cab. ??
Also, it's not just the speaker size, but the quality of the speaker and cabinet design. There's alot of junk out there. It pays to spend the extra $'s and get quality equipment.