I just spent one night here while working in London and it was perfect for that. Karolina was super quick to respond to my booking enquiry, seemed very helpful and friendly, check in was very easy, it is in a great location, and is surprisingly quiet at night for central London.
The place was very clean, however, there were a few bits of non-essential maintenance which would turn this from somewhere that is fine, to somewhere that is really nice. And the stairwell / entrance etc could definitely do with a little love. Having said that, it really is pretty good value, and I know that I might have an over-active attention to detail....!
Overall, it's a nice place, and if needed somewhere to stay around there again, I'd definitely give it another try.