This is a good quality focuser for the price. My first impressions when I opened the box was the high quality finish with of sturdy metal base and pleasing appearance. The fine focussing knob worked a treat on my homemade Newtonian reflector compared to the old rack-and-pinion focuser it replaced.
The only downside I found was that two of the four boltholes were positioned very close to, and even partly underneath, the focusing barrel. I therefore found the fitting and tightening of the bolts rather awkward. It seems to me that this is a design fault and I see no reason why the manufacturer could not have placed the two holes at a slight distance from the barrel for easy tool access. Hence the reason for the 4 star rating.
Having said that, it is still worth every penny for it's high quality and excellent performance.

This is not the best focuser on the market but is very good for the price. Nice smooth action and good fine focussing. I would not recommend if you expect it to carry a lot of weight such as a filter wheel or DSLR camera but for observing is great. I replaced the stock single speed focuser on Skywatcher 8" Dobsonian and was a direct replacement, no need to adjust the holes in the tube. As I say there are better focusers but probably 2 to 3X the price as well so for observing more than adequate.

brought this a while ago and is 100%better than the standard rack and pinion i bought it for photo work with a dslr/webcam and focus is so much more easier and precise get one you will never look back