When they actually stick to covers of Christmas songs they are okay. Certainly their more well known Christmas songs are great. But when they start doing their original Christmas songs or even worse, their original non-Christmas songs- they quickly devolve into early 90's rocker wanna-be's. The 90's ended for a reason and they need to take TSO back with them.
Although to be fair, what they lack in good music they more than make up for in fog machines, lighting effects and hair conditioner.