I had a Sony 3D Blu-Ray Player w/4K Streaming Media Upscaling, being used with My Samsung 4K Curved Screen 3D TV. They came with 1 pair of "Active" 3D Glasses (These Glasses required a battery change just to get through a long movie!!!) I was never happy with the Sony 3D Player, I barely ever saw anything I could get excited about when it came to the 3D effect. Then, Honestly, I couldn't believe it when it quit 2 days after the 1 Year Warranty Expired, and I didn't take it back to Walmart for a couple of weeks, so, Walmart wouldn't take them back!!! (I won't buy electronics there anymore) So, I purchased a Samsung 3D Ultra 4K Blu-Ray Player w/4K Media Streaming Upscale, and I was disappointed when it came with NO 3D Glasses at all. So, I tried using the Sony "Active" 3D Glasses that I already had (The battery eaters). Well, the Samsung didn't seem any better than the Sony, even though it had very good reviews on different web sites I looked at before buying it. My Dad had a much better 3D effect on his LG 3D TV that uses a "passive" (No Battery) 3D Glasses system. Well, I saw these Expand 3D "active" Glasses at Best Buy, and decided that I'd put out a few more dollars, (I might as well at this point) and see if these glasses were any better. WOW.... I saw things in My 3D movies that I've never seen before!!! I've had these movies for over a year now, and I have probably watched each of them (in 3D) ten times or more. Suddenly I want to go out and buy more 3D movies!!! It honestly was almost like comparing Black & White TV to 4K High Definition, it was that dramatic a difference. The picture is fantastic!!! I wore them with Wireless Ear Buds, so, they were VERY comfortable. Compared to those stupid looking, and non functioning, Sony "active" Glasses these are in a league by themselves. I know that there are other, much more expensive, 3D Glasses out there but I can't imagine that they are that much better. If you've got the right 3D TV and 3D Blu-Ray Player, that uses "active" 3D Glasses, You can't go wrong with these. In addition to the visual effect these Glasses are comfortable, they have an adjustable nosepiece, they look a lot better, and best of all they're rechargeable (I got three movies out of a 2 hour charge.. I've already paid for these Glasses just on battery cost), so, NO MORE BATTERY EATERS!!!