The check-in is always fast, the rooms are ok (a little small, but practical), the toilets are very small but are also very practical, the shower works great, and the beds are comfortable. I've stayed there more than 10 times already. I only consider the breakfast as very poor because does not offer western breakfast.
The rate is very cheap and the location is pretty nice specially in the case if you need to go to the airport (only 15 minutes away, taking only highways). You can get taxis easily and also the subway station is just 30 meters away, one of the best Ibis Hotels that I've ever stayed.
Considering that Ibis Hotels are designed for travellers, I would say this one is the best for a short and cheap stay in Beijing.More