I'll compare it to the Takahashi Collimating Scope on my classical cassegrain, SCT's and my 8" Edge.
Just an update. I received the REEGO collimator from Teleskop Service. I had to wait for it to get back in stock. After TS shipped, it only took four days to get to my door by UPS Express from Germany. First some pictures:
This is the top view with the battery and mode switches.
For Newtonians and Cassegrains, you use the red mode.
For Refractors you use the four white LEDs.
I tested the REEGO on a 4" SW Evostar Pro 100. Looking into the peephole in this mode you see multiple reflections of the four white LED's If the scope is collimated, all the reflections will line up in a cross pattern with all the reflections in line. My Evostar was very close to well collimated. It's pretty easy to see when it's off. Testing my Celestron 102, which I know is slightly off, the REEGO picked up this showing some of the reflections a little out of align. Using it on my ST80 that I know is way off, the REEGO also showed this.
Moving to my 8 inch Edge, you switch to red mode and you see the how the primary is aligned by the concentricity (word?) of the outer rings you see looking into the peephole. You can't check the secondary because the mirror is not center marked. I pulled the fastar secondary and using my 3d printer, I made a cup matching the diameter of the secondary and put a 1mm hole in the center. Using the cup upside down, I placed a Sharpie dot at the center of the secondary. My Edge 8 I know was in good collimation and the REEGO confirmed this. If you're not comfortable marking your secondary, the collimator won't do you any good for an SCT.
The main reason I purchased the REEGO was for my new 6" GSO classical cassegrain. I have the Takahashi collimating scope, but I couldn't resist getting the REEGO to play with. When I received the CC6, collimation was very very close per the TAK scope. Checking with the REEGO, it looked like it was in collimation. I made a very fine tweak to the CC6 secondary bringing the black dot to the center of the doughnut. Checking again with the REEGO it still looked in collimation.
I must point out that the TAK scope has a great advantage here as it magnifies everything by a factor of 6 making the enlarged image of the secondary doughnut MUCH easier to see when when the black dot is centered in the doughnut. Other than this difference, I think the REEGO holds it's own with the TAK scope.
I haven't used it on any of my newts yet. Overall, I'm very happy with the REEGO. I think it is a good, all purpose collimator that works well. Would I buy it again? - yes.
I was able to track down and translate separate copies of directions for Newts, Refractors and Cassegrains. I didn't post them as I don't want to violate any TOS. If you get the REEGO you can PM me and I'll email them to you.