The concert was good. Not spectacular, not terrible, but somewhere in the middle. I would say that I'm a fan. Not a fan that would cry at the concert, but a reasonable fan.
Pros: the boys sing completely live, they are interactive with fans, the back-up dancers are entertaining.
Cons: the slideshows played between songs was redundant, the sound system drowns out their voices, during the songs I did not know- I felt very bored, tickets are expensive! ($318.00 later for two mid level seats left me unimpressed).
Would I recommend them? Yes. Would I go seem them again? No.