We were going to be in SD for a few days to visit with family and I thought I would try Priceline. I got the Manchester Hyatt for $100 a night. Not that much lower that the lowest rate on the Hyatt website but with parking at $20/day, I thought $120 was better than $170. We had a room on the 25th floor. I didn't hear the trains but my husband did and it bothered him at times. The room was tiny for the four of us (w/kids 5 & 13) but clean. I didn't like the deodorizer that they sprayed all over the place and it was a hike to get anywhere around the hotel. There were a lot of people there - including the Univ. of Texas football team but it never felt like it was crowded. We liked the proximity to Seaport Village and ate there a few times. We also walked a few blocks to Horton Plaza - a nice mall. It was a nice walk after being in the car for 3 hours. I liked having what we needed nearby but I'd think I'd like to try a smaller hotel next time.