Yes. I have purchased a grow tent kit and some additional items from HTG. The products seem to be very good quality, and the one problem I had with a small fan they remedied right away. AND they've been great fielding some set up questions.
Some people here will say that you can make a lot of what's in the kit for 1/4 to 1/3 the price, and perhaps that's true, but time is money in my book, and once I had figured out what I wanted, it was very quick to order from them, and it would have taken me a week to try to make everything. And then it would have looked like crap, and since this is in my living area in a studio apartment, the fact that it's neat and clean meant a lot to me.
But literally 20 people here will happily give advice on how to make everything.