I've read many of the past reviews, and we were a little worried when we booked, but it exceeded EVERY possible expectation. The rooms were BEAUTIFUL! I understand that there is still some renovation going on (the building next to ours was being renovated), but not once did the renovations wake us or impede our enjoyment. We walked into our apartment and were amazed at how nice it looked. We had a 2-bedroom unit for myself and my wife, our baby and my good friend and his wife.
Both bedrooms featured very comfortable King-size beds and 42-inch flatscreen TVs, and the living area featured a pull-out couch (we never pulled it out, and thus cannot comment on its comfort) and a comfy chair to sit in and watch the even bigger flatscreen TV. There was a DVD player and a stereo system with iPod docking place (I don't have an iPod, so I'm not sure what it's called, but if you have an iPod, you know what I mean). Our porch had a nice little table and some chairs which we sat in to enjoy our first lunch there.
The dining area had a nice glass table with chandelier and 6 chairs, and the kitchen was well stocked with utensils, bowls, mixing bowls, a blender, dishwasher, microwave, gas oven, and full-sized fridge/freezer. They even had dish detergent for the dishwasher as well as a small Palmolive for whatever you wanted to wash by hand.
The laundry room featured a full-sized washer and dryer and they even had little sample packs of laundry detergent and fabric softening sheets (which they refilled mid-week and upon request).
The wireless internet worked without a hitch and I'd go so far as to say that it was more reliable than my home service, sadly.
We made ample use of the pool and spa -- the pools are heated and the whirlpool was toasty -- I felt like a happy lobster drinking my beer by the whirlpool.
The staff was very friendly, a maintenance worker saw us getting out of our car, asked if we needed anything, then told us to please tell someone if something went wrong, so that they could fix it, "We don't know until you tell us," he said.
Location-wise it is amazing. With my infant son in a stroller, it still took only 10-15 minutes to walk to the strip (Harrah's, Bill's, Bally's are closest) and they have a shuttle that leaves hourly to the strip as well if you're not in a walking mood.
We rented a car so that we could easily get to the Grand Canyon, shopping, etc., but it wasn't a "must" to have a car. They have shuttles to Fremont Street as well as to a grocery store (Von's). And if you're on the strip somewhere a shuttle doesn't go, a cab cost us $11 from Luxor, and $9 from Bally's.
I guess some of the previous reviewers had a bad time, but it must be the "OLD" Summer Bay. Maybe they are going out of their way to address previous problems, but I would have to truly pick nits in order to find negative things to say about our stay. We'd return in a heartbeat.