I stayed in Block B of Yayuncun Hotel for 10 days while at a conference at the CNCC, which is about a 15-20 minute walk from the hotel.
Location:
IMPORTANT NOTE: Google maps puts this hotel in the wrong location! It's actually located NE of the google maps location, near the corner of Anli and Huizhong Rd. The sign for the hotel isn't huge, and many of the towers are actually labeled something like "Northstar service apartments," so it's easy to be fooled.
Aside from the Olympic park, there is not much to see in the area. Subway stations are all about a 20 minute walk away as well. There are a few restaurants in the area, but not many--the majority of the stores in the area appear to be cell phone stores. There is a nice grocery store about 2 min east of the hotel on the corner.
Room:
The room was big for the price, and unlike other reviewers I found the bathroom quite nice. My bathroom was not a 'wet floor' style, and the drains worked fine. The beds though, I found to be very hard and uncomfortable. The AC worked well enough. I never tried using the internet because my new Mac doesn't come with an ethernet port, which is the only way to connect at the hotel.
Staff:
Staff were friendly and tried to be helpful--when my adapter didn't actually fit the electrical sockets, they found one for me to borrow. Having said that though, almost nobody speaks English. At most, they might speak a few words. I showed them my adapter and how it wouldn't work for them to understand, but once they understood they were great.
Food:
I found the complimentary breakfast to be not very good. Though, I actually didn't like authentic Chinese food all that much either, so I might just be a picky eater. Their restaurant has a couple fish tanks (not the decorative kind, like the kind where you know that's where your dinner is coming from), and in one of them was a large dead fish that was left there for a few days. Wasn't exactly appetizing...
Amenities:
You have to boil the water out of the faucet, but that's standard in Beijing. They provided soap, shampoo, combs, toothbrushes, and slippers. I'm actually not sure if they ever changed the sheets in the 10 days that I was there--it seemed like they just made the bed. I think they did change the towels though.