My stay with Blue Star was OK. I had no problems, really. The place was spotless, but sterile. If that's what's important to you, and only that, then stay here. What it was missing for me was character. The room was squeaky clean, floors so shiny you could see yourself in the reflection. But it lacked any kind of personal touch. In that way I was disappointed. My impression, when I booked it, was I was staying in someone's place and, as such, I expected some evidence of habitation. This could have been pictures on a wall, plants, books on shelves, etc. But it wasn't that. It appears to be a kind of apartment building that is all short term rentals, ie AirBNB. It looks and feels like no one lives there unless it's a traveler. If I wanted a hotel, I would have booked a hotel. I think even a hotel would have more signs of life. But I wanted the AirBNB experience I have come to expect: staying, like a resident, in someone's place. This was not that.
Practically speaking, there was a friendly and helpful front desk person. She was nice.
The apartment felt cold. Indeed only one of the 3-4 heaters worked. The apartment door took a little getting used to: to close it you have to unlock it. This was just a minor inconvenience.
So in summary, it was ok. There was nothing wrong with it, but it wasn't at all homey or home-like or even home-away-from-home-like. It was a place to crash not far at all from Earl's Court station.