We stayed at the Royal Hotel Saigon for 3 days. The hotels was nice, a bit older, but had all the things we required. The staff help us book a day tour before arrival, and was generally very helpful.
The breakfast is good. The pool is okay, nothing special. There was a jacuzzi, but it was not working.
The only problem we encountered was that we arrived a few hours early, but could not checkin before the listed checkin time, without paying 50% day rate.
Overall a okay hotel, but an older one. Would probably stay there again, but there are other hotels with more benefits in the same areas and at the same price.