
I have field tested it twice. This chair is very easy to setup - just open up the legs and chair. It fits into the car's boot, it is light (about 5kg), well made in Japan, comfortable, infinitely adjustable (meaning there is no discrete steps in position), has foot rest, easy to adjust by lifting the seat up and placing it at the position required, seat also will not get lost as it is in the chair's frame. Also, when I move the chair, the seat does not drop off from its position. The adjustment range is good and at maximum height, I can seat while my dob is pointed zenith...but if I get a tracking platform which adds height to the dob, I need to place the chair on the trolley (that I use for transporting the dob) for added height.
When folded:
http://img89.imageshack.us/img89/3756/img0216so0.jpg
At lowest position:
http://img120.imageshack.us/img120/6149/img0213ql0.jpg
At highest position:
http://img89.imageshack.us/img89/2661/img0214xs9.jpg
For visual observing, there are a few things that I find VERY IMPORTANT. Firstly, I find the eye patch very essential. I do not know about you guys, but with the eye patch, my eyes are relaxed I can observe much longer without any strain and I am able to observe fine details better. One of the reasons why people buy binoviewers is because of the comfort. With an eye patch, it can give almost equal comfort as a binoviewer. Secondly, is the chair. I have been looking for a proper chair for a long time, but this time I have a good one.

http://img248.imageshack.us/img248/6704/img0217xb5.jpg