I can't say I was too impressed with the series when it came out, looked to me like a re-branded Tour 700, albeit the lighter weight. Even the same chrome on black finish, with an added "crunch" and compressor. Also, wasn't happy at all that the 600W rating is not marked RMS, but Maximum Lightweight Class D Power?
I like the Tour series and find they do a pretty good job getting a nice and usable tone, but I don't think there's much special about this head. Remember, I haven't played this (yet, local store is a carrier and might have it when I go in sometime next weekend) and this is all impression and IMO!