Those tents are really neat. I've helped assemble one, and someone whose growing I respect very much runs one and is happy with it, and his thumbs up means a lot.
Pros:
Easy to set up and use
Pre-cut for all your ventilation junk
Protects the floor
Can be rolled up, dirty floor and all, and stuffed in a duffel bag

Cons:
History of 'Hydrohut Syndrome' which they have supposedly taken care of and should not be a problem any more with newer units
Limits you to xx square feet (but I guess you can get another :jointsmile