I presently have and been using the the Chrony Master Gamma for 5 years. I also have their printer and the indoor light set up. I can't say anything bad about it. It has never failed, delivers good readings and is just as accurate as others in their price range.
I had an Oehler 3 screen and due to it's size and set up time I sold it to a gunsmith who uses it when he fires a rebarreled action.