Has anyone had the experience of staying at this place? How clean is it and how comfortable is it going to be for a few-week stay?

I stayed there back in 2006 for 3 days. May be it has changed, but at the time it was clean and quiet place. If you are not looking for more, than it will be fine to spend a week or two. Good luck.

Tripadvisor.com is generally a good source to find those things out.

I stayed there for nearly 2 weeks in early 2005. It is very basic and many of the rooms have shared toilets and bathrooms which isn't ideal. It is clean but I felt that for what they charge it is over priced. I'd stay there again, but only if really restricted by budget.