I have bought flutes by Jeff Whittier and Pratap Gujar from one world trading. To be honest I would find it hard to offer much in the way of comments beyond that they are both wonderful flutes. I play the Jeff Whittier special edition Pandit Hariprasad Chaurasia flute (tonic D#) daily and it is my favorite flute.
As for the company I found one world trading friendly and easy to deal with - my own personal experience anyway. 
Thanks.
I finally received my bansuri yesterday. First of all, I am very surprised by the quality for the price: the flute looks very nicely made, with good and straight (and not too thin) bamboo.
The sound also is very good in my opinion: it is exactly the beautiful haunting deep sound that I was looking for. It is also easy to get a sound from it, not too much breath requirement. The problem is: this flute is huge ! Almost 30 inches long, and the finger spacing is crazy !
Even if I am used to low D whistles and I know how to play with the piper grip, I had problems all evening to cover all the holes and get a full low B note. By the way, the main problem is NOT the last three holes (I can manage to cover them quite well with my right hand). The problem are the FIRST three holes ! If I cover the first two with my left hand fingers, I struggle to cover the third one…
But I hope that I will manage to make it sooner or later.
In the meantime, I ordered a smaller flute from the same manufacturer,
in low D (tonic ) which should be more or less long as my Tipple Irish flute. I must say that I am positively surprised by this first experience with the Bansuri world. These flutes have a great sound, and cost very little. Thanks for the attention.
Anchor your left ring finger with its top phalange on L3
The middle finger’s and index finger’s middle phalanges are to cover
L2 and L1.
By planting your L3 first you use that to pivot the application of the other two.
Once you find the right spot (angle and point on each phalange) for you it will begin to happen automatically for each finger but that is how you begin.
Also the left thumb position is vital.
Check out the Prasad Bhandarkar site linked into in my bansi-links topic. He has explained nicely.