I have that EXACT scope on one of my rifles and would say the glass is actually pretty darn good! I also really like the reticle and the turrets have good feedback/clicks. I normally stay above that level of glass but I had an old Burris that bit the dust and was given an E1 as a Warranty replacement. I was pleasantly surprised with it. I compared it side to side with several of mid range glass (Monarch, Big Sky, 4200, Conquest, Fullfield I and Signature models) and it was just about even with all of them for the most part which is great considering the cheap price. There is one issue that I am not that pleased with and that is low light. The light trasmission seems pretty good BUT the reticle is very difficult to see in low light.
Everyone's eyes are different but in the $250 and below range it is a hard scope to beat if you can live with the reticle in low light. In normal light I really think the reticle is pretty awesome though. I have it on a rifle that I don't use much and have decided to stick with AM hunts so I have more normal light to deal with. If you can find a way live with something in 300-600 range you will kind of be in the optic sweet spot for great value for the dollar spent.
It is certainly a good scope and I do like mine. I guess my own personal opinion is if I only had $250 to spend I would more than likely buy another. It is easy glass to get behind and the eye box is pretty forgiving. If I had 300+ to spend I would go another route. It's a solid $250 scope by all means! Just keep in mind everyone's eyes see the world different through scopes so try to look through one first. For example, A lot of folks really like Vortex but my eyes don't work as well with them (only speaking of the Viper and Diamondback line which are really good scopes...especially the Viper). I also don't wear glasses if that makes any difference. The eye relief and box on Vortex seems sensitive to me. That being said someone may feel the same way about the E1 so you really need to look through one or buy 2/3 then return the ones you don't like.
Best of luck to you!