Stayed at Bally's for our most recent trip to Vegas. They are located mid-strip, which makes it an ideal location for walking around and seeing most of the other hotels, without wearing yourself out completely. Check-in took a bit of time, we waited for about 30 minutes in the line while two staff members tried to work through a line of about 25-30 people. When we were second in line to get checked-in they finally had one more staff member start checking others in.
The room was clean and had a decent view of the strip, and like most hotels on the strip it was a bit of a walk from the front door of the hotel to our room since the overall building is huge.
They have a variety of things that you can do within the hotel, aside from the obvious gambling. They have several restaurants and it's a great feature that they are attached and have a walk-through to the Paris Hotel - which has tons of restaurants and shows of their own.
Check out was much easier than check-in since we just had to sign off on the rapid check out form and drop it in a box by the check-in area.
Overall: B+
We would stay here again when we go back - no real complaints. Middle of the strip makes it super convenient.