Im using a tent and love the thing! So are a handful of other people. Pop in my thread (in my sig) and you will meet a few other people who are using tents (or will be soon). It really comes down to the room the tent is in though...how you are running ducting etc. If you have nowhere to remove the hot air to (or pull in/create colder air from), yeah a tent is going to be a pain.
EDIT: Having an environmental controller (for fans etc) such as a thermo/humidistat of some kind (or a Sentinel) are a big help also.