I visited the premises in Boudha in person. Its not just next to the stupa like many shops but a little way away and easy to find with Googlemaps - just ask locals when you get there as they didn't have an obvious sign, at least when I visited. They have modern studios, workshops and a salesroom all in the same buildng. Bipin was very helpful and I examined several bhavacakra thankas before settling for a beautifully detailed one. The brocade was added in a day or two and the final thanka was delivered to my hotel very carefully and robustly packaged. I was very happy with the thankas I bought and very happy with the service, Definitely recommended!