Great hotel - look for discount
Loved the Omni for our two night stay in a room for four. Best spot on the river walk. Rooms have nice character. Bit of a hassle dropping bags at check-in due to many guests arriving / departing at same time with limited car space, but bellmen were efficient and polite. 
Save money by parking in covered lot directly across the street ($10 day) instead of valet. 
We found an amazing room rate by Booking with discount at save.visitSanantonio.com - highly recommend checking there before booking.