Just wondering if I am missing the point here, I read plenty about how amazingly better you can see into the water but I have had 2 pairs and only found them a little better than normal eyes

First pair were from Lidl so fair enough they might have been rubbish, 2nd pair werent hugely expensive either - £15 from a fishing shop, the brand is Eyelevel. Didnt notice any difference between the 2 pairs either although couldnt compare directly as the first
pr got stood on!
I find I can see a little better as they remove some of the glare but theres always enough glare left to stop me seeing enough that they would seem worthwhile. Apart from the obvious advantage of protecting eyes from flies
Do you only get good results with expensive ones?
Do they work better with "gin clear" water?