Works very well once it is properly aligned. This can be tricky because it can't be done in too much light. I have found the best way to align it is with the moon. It is relatively distant, and gives a good target. I also have red dot finder scopes and they can be aligned in the day, which simplifies things, however they don't give as good a view of the sky as the Telrad does.

A must have for amature astronomers. I also have a 9x50 RACI & a laster pointer, but I still use this regularly as it is the only tool that I have (and by far the best tool) for measuring the sky. Being able to measure the sky is critical in finding and identifying those objects that just look like stars. Yes its big and bulky and you may think its ugly, but it is what it is and what it is is an essential piece on any telescope.

Works Like a charm.

I have five different finder scopes and this one is the best so far. Super easy to use. Aligns real quick. Bright, large target in the view makes it easy to see where you are pointing.

I had it lined up and ready in less that 1 minute. Basically pointed my scope to Jupiter and centered it in the eyepiece. Tweaked the three adjusting knobs on the finder to align and good to go. Way easier to align that other sights I own. Same simple method as used to center the primary mirror on a Newtonian/reflector. Spent the next few minutes just randomly star hopping and every time I hit the center FOV. Very impressed as to how much easier it was to locate night sky objects. I spend an extra 10 seconds at the end of viewing to remove the finder from my scope. Next time it's used it still stays good without having to adjust a thing.

The base fits easily and quickly to the scope by simply using the supplied sticky pads. This to me was a little disappointing, but some people may prefer it that way. Anyway, I chose to not use the sticky pads and instead screwed the base onto my scope. The base (and sight) are made of plastic which made the mount easy to drill. Quickly removed my existing dove mount from the scope, drilled a couple of holes in the Telrad base, and screwed it onto where the dove mount used to be.

Sight is also powered by 2 AA batteries which I think is great. Pretty much every household has a handy pack of AA's going around. Very quick and easy to replace the batteries if your sight loses power. Now if my sight died and I was to look around the house for a pack of CR 2032 batteries (which most other sights use) then I would be up the creek.

Also the sight does seem quite large when you first open the box. Comes in at 8 inches long, 5 inches high (including the base) to the tip of the viewer, and 2 inches wide. In comparison I would say that it is around twice the size of an EZ finder II. Although it does seem big it is light in weight. Have not tried it on my EQ mounted scope but I think it would not effect the counter balance.

Except for my little dislike on the sticky tape mount method I overall love this sight and would recommend it.

OMG. I hated the finder's scope that came with the Celestron CPC 800. To align the telescope to 3 stars with the finder's scope was tedious, time consuming, and a royal pain. I asked a local astronomy club members if there was something better, and just about all of them recommended the Telrad. The telrad is somewhat bulky. Other than that, I love it. It makes it so much easier to locate a star or do an alignment with it. It now takes me seconds to find a star vs several minutes of continuously moving the telescope around and trying to find the star through the finder. I don't even touch the finder's scope anymore. The telrad is definitely a must have. I do have one advice. The telrad is a bit heavy. I found that if I placed the telrad closer to the front of the telescope, it makes it top heavy. The best location for it is toward the back.

This finder is wonderful! I literally had my dobsonian pointed to M31 in 30 seconds with it. It took me many times longer with my RACI 9x50 alone. I use this in addition to my 9x50 finder. I also bought the Telrad 4" riser which helps raise this finder up to more easily see it when bending over.