Security TERRIBLE, Least Hospitable Hotel in Texas
The Omni La Mansion del Rio hotel is beautiful, historical, and convenient if you're visiting the Riverwalk. I had dreamed of staying at this spectacular hotel for decades (literally). And I'm pleased that I was able to stay. But I'll never stay again, and I wouldn't recommend it to anyone who wasn't exceedingly wealthy. The staff at the front desk and concierge desk were terribly rude and snobbish. Left a very bad taste in my mouth. 
If you're a real person with a real budget who values hospitable service and simple amenities like free Wi-Fi, keep looking. They will ding you every time you turn around, and they will be rude to you in the process. No microwave in the room, no free Wi-Fi, all parking at the hotel is valet only and they charge you $32/night for it. There is a little refrigerator, but it is full of overpriced minibar items. 
They have everything you want, but they're going to charge you for absolutely everything. And the pretentious attitudes of the front desk staff was just too much for me. Next time I'll stay at a hotel that is half the price, offers free parking, free wi-fi, and some sort of breakfast. I may walk (or drive) a bit more but I'll be happier and money ahead at the end of my stay. 
Security at the hotel was nothing short of very frightening in the room where we stayed. The curtains in our room (and many other rooms I noticed) went across the French door, but it was arranged in such a way that to get into or out of your room, you had to leave the curtains open in order to open the door. This meant that anyone walking the hallway outside your room could see into your room, could tell whether you were there or not, and could see anything and everything you had in your room. And anyone who walked into the hotel restaurant or bar had free access to your room. There was no key card-only access to the corridors where these rooms were. I'm no security expert, but even I could see that this was a really bad setup. 
If I were extremely wealthy, and money were no object, or if I were traveling on business when my company picked up the entire tab, I might stay there. But for my money I'll stay somewhere else. 
The hotel stay was so bad we ended up checking out 3 days early. To be completely fair, the young lady who helped me as I was checking out was very helpful to me, and she was quite pleasant. And the hotel did refund me for the 3 days that I had paid for as part of my package, which they probably didn't have to do, and I did appreciate that.