Bests & Worsts Reviews from Amazon

The optics are good, but the software and the tech service are terrible. I ordered the Celestron NexStar 130 SLT based on glowing reviews I had read. It arrived promptly and was easy to assemble. I was easily able to align the view finder with the main optics, which seemed to be very good. But I was totally unable the align the computer. I made a dozen attempts after entering and re-entering the necessary information and entering the position of various triplets of widely spaced stars, but the computer kept telling me that alignment had failed. I attempted one call to tech service, but was on hold for half an hour before I gave up. I emailed tech service regarding my problem, and received an automatic acknowledgement, but absolutely no further contact over a two week period. Amazon allowed me to return the scope as defective, and even paid the return shipping. So Celestron was terrible, but Amazon was great.