I got a free night after I signed up for that card, but they used my cert on the next rewards stay I made without my knowledge. It was a Cat 3 hotel and I wanted to use points, but they used my Cat 1-4 cert on it instead of points. I would have preferred to save the cert for a night in a Cat 4 hotel.
I didn't realize what happened until a couple months later when I tried to use the cert. I called and the lady I spoke with promised to deduct 15K points and re-issue the cert, but that never happened. They issued me a new Cat 1-3 cert and then cancelled it a day later. I've been too busy to call back and try to straigten things out again - and I'm not even sure if 5K points is worth my time and effort.