I've been going to Darque Tan on and off for about three years now. This location keeps a nice, clean store and offers about 20 beds of varying intensity levels. I usually use a level 2 bed which carries a max of 20 minutes and gives me a nice color.
I went in today to buy a new package after taking a 6 month hiatus from tanning, and the sales associate was incredibly helpful. She took her time pulling about five bottles of lotion off the shelves and explaining all their different qualities and price points; she was very knowledgeable and I really appreciated her doing that. She didn't just pressure me in to buying the most expensive lotion they offer.
Darque Tan offers monthly memberships as well as pre-paid packages; I use the $33.88/month package that allows for unlimited tans in level 1 and 2 beds at any DT location.
The only reason I didn't give five stars is because their lotions are pretty pricey. I bought a "middle of the road" lotion with bronzers and DHA properties and it ran me $92, but they are offering a special right now that purchasing a lotion gives you money credited back to your account for upgrades.