How long does it take to get to the skytrain?

Yes - we did stay in the OBI for our last night in Thailand and it was lovely. The mother/son team who run the inn were so nice and accomidating. I would definitely recommend it as a nice boutique hotel experience in Bangkok. The OBI is very personable and treats their guests very well.

but the location is not that convenient??

We found the location to be fine and were only there for one night, so it wasn't a big deal. Our plane actually left very late the next night and they let use stay in our room and use it and not pay extra money which was extremely nice!