I bought this as I had seen positive reviews. I had for some time been contemplating buying a new scope, but I decided to buy some upgrades instead, due to the headache of buying a longer focal length that would have been created.

I've yet to be able to fully test it, as the clouds made an appearance. However, from the test shots I did manage, there is a marked improvement on the star formation. Additionally, the collimation of the primary is now much quick and easier. Given it's price, I feel this is a great upgrade as part of your setup.

I bought this for my Skywatcher 200PDS to improve the diffraction spikes. It comes with comprehensive instructions and was easy to fit. One the primary mirror is removed and the metal mirror clips, the rubber supports are trimmed back before installing the mask. The whole procedure took about 15 minutes and first results on Vega look really impressive.