For anyone that doesn't know, this was made as a replacement product for the Viper: Night Drivin' Glo Balls. About three people in the world like that game, I'm one of them, and one of the biggest problems with it was the original Glo Balls. In short...
They got beat up, ops took them out (which totally changed the way the game played - it plays like crap with regular balls), and replacements were impossible to find. Oh, and they didn't really glow, they were just sort of neon yellow, which oddly didn't react much at all.
I was constantly cleaning my balls (yeah yeah, ha ha) in Viper - if I didn't every 30 or so games, they would pick up rubber bits and start bouncing around. This made the game nearly unplayable.
Needed new Glo Balls? They cost about $300. Per ball. Don't buy a VND without 'em or you're looking at nearly the cost of the game to get them.
I got one of the first sets of these and have reviewed them multiple times - Yes, they get little dents on them. Yes, they aren't as hard as steel. And yes, eventually they start picking up bits of rubber and you have to clean them. But, they are a nearly perfect replacement product for the VND Glo Balls, and nearly the exact same weight and size too. I have run four in VND since I got them last year, and hundreds of games later, I have cleaned them once and they look a billion times better than my old balls do. Oh, and they actually react to the light and glow (when they are near the lights) so that's a bonus too.
These definitely aren't for everyone, and they aren't for every game... but, they work really well if you look at them for what they are - an *undeniably* improved Glo Ball, that also comes in other colors. If you want to drop them into other games, a pack for $60 or whatever it is is way cheaper than $300 for a single ball like it was just about a year ago.