It's pretty good for the money, if you want to hear sound bytes, check out www.rocksolidamps.com the owner of that website is on this forum too, seems like a friendly guy.

a friend of mine (Mr. Kwint on this forum) has the thunder combo and it was pretty badass, basic tube amp with killer distortion. (ofcourse not as versatile as the powerball, savage and blackmore..)

I played the top version too, through a mesa recto cab with an ltd viper loaded with emg 81's, it rocked. so I suggest you try it out for yourself!

ofcourse I'm slightly biased, beeing an two time engl owner