I'm pretty happy with the set consisting of cover glasses and slides. - I've bought them for the university and for that they were far enough. Will my: No disturbing air inclusions in the glass and on and easy to handle for themselves. A few people here complain about the fact that one could label them bad, but I think it's not really disturbing, because I do not need the option in my preparations. Points are deducted there are so because of the cardboard box in which the slides have been already badly crushed on arrival and was bruised. - The glasses are indeed healing, but NEN pretty impression makes it still does not (especially since the offer is not necessarily the market Cheapest and because I expect quality even with the package.)