Why not give them a try yourself. They come with a 30 day money back guarantee. When viewing the Orion Nebula through these binoviewers, he said the images blew him away, and he was very impressed with their high power clarity. He said these were very good with Nebula and various Messier objects. Now I have researched extensively all the features that make binoviewers easy, trouble free, and enjoyable to use.
Various models have undesirable characteristics.
All of these have been taken into consideration. I am going to give you a link that tells you almost everything you need to know about the various binoviewers from Televue to Astrophysics to Celestron, and others. This web site belongs to a Weatherman from Boston who also is an avid astronomer and astronomy product reviewer. He has done comparative tests, and I strongly recommend that you read his entire article before you purchase this product. This pair of binoviewers are a compact, fairly light and has an eyepiece clear apertures of 22mm.