no plug near the bed, if you need to charge mobile phone you can not use it on the bed at the same time.
The path between station and hotel involve some stair (as footbridge), and a bit far if you insist to the lift.
But after all it is good choice if you just stay at Ueno for 1 night.
It's very close to Ueno station, the price compare to the other hotel near that area for single room is pretty low. The room is very small, but if you are not planning to stay in hotel very long then that might just be enough. And for just staying one night, I think it's OK for me.