The location is excellent: it's a bit out, but that also means it's quiet. It is very well connected though, and both Stratford and the O2 are just round the corner. The DLR station being in zone 2 is also a bonus.
The room is a bit small, but it's just fine as a place to sleep. The bed is warm and comfortable and there is plenty of storage.
It is really a good place, and proof of this is that this is the second time I book here, and I've already booked a third.