I use this hostel every time I have an appointment at Bumrungrad Hospital. It is close and convenient. Also 5 min walk to Ploen Chit BTS and plenty of motorbike taxis. I stay in the capsule rooms which are nice and comfortable.
Cons:
The first time I stayed here, the sheets were dirty, they had forgotten to change them from the previous user. This time, there was a stain on my sheets, which bothered me, but it was late at night so I couldn't ask to change the sheets and I only stayed one night. There are only a few bathrooms and there are no hooks to put your things. Small thing, but a frustrating one when sharing a bathroom.
Pros
Generally clean, convenient, nice lobby area to hang out in. I will stay here again only for my appointments at the hospital, the area isn't that great to go out in. I prefer Matchbox Hostel for fun visits. I like the capsules, plenty of space inside, with outlets and light.