I've stayed at Alexandra's for a month and a half and I would've stayed even more if I hadn't had prior engagements. I couldn't recommend it more, great host, great area near the tube station, beautiful neighborhood.
I'm a freelance so wifi connection was important to me and it was fast and flawless.
En-suite room is sparkling clean, cleaned every week and sheets and towels replaced with new clean ones, it really felt like a five star hotel but cosier.