The club level is pretty nifty. It's the entire top floor of the hotel, and, right by the elevators you will find the lounge area. By morning they set up a free continental breakfast. Nothing fancy, it's just continental fare (juices, milk, coffee, baked goods like croissants, donuts, bagels). But it's a real cozy area with tv and stereo -- you can borrow the CDs to play back at your room if you want.
At night they have an hors d'vors area set up with drinks and light finger food.
They have concierge-staffed desk too, to help you with trip plans and dining reservations.
It's nice. The whole hotel, literally and figuratively, rocks. If the upgrade to club isn't much, and you think you'll enjoy the pampering and make some of that back with the free breakfast, go for it. Either way, have an excellent time no matter where you stay.
Rick