DISCLAIMER: I have never and will likely never give a five-star rating, as perfection is simply too much to ask for.However, at the Wayfair price point for this item, a 75 cm stability ball, it's hard to imagine making a better purchase decision. I am a personal trainer, so I know my equipment, and hopefully, this review helps ease somebody's mind on a purchase.One could easily argue that a ball is a ball, so what separates this one?The Pros:- A very symmetrical spherical shape (no egging or lumps).- It has a good seal, which increases the time between re-inflations.- You can adjust the firmness (as with any ball), with the degree of inflation, but this ball gives you a good range due to having what appears to be good material elasticity, and it's quite firm at 75 cm (max inflation). ***Remember to never over-inflate, leave in direct sunlight or extreme temps..you'll kill the ball's lifespan!!!***- The "sport" texture adds beneficial friction for people that work up a sweat.- The "sport" firmness is simply a preference that I like in this size ball (thinner skinned balls will have a different feel and weight distribution factor--again, a preference thing for the experienced user).- The ball maintains a mild sweet smell, unlike certain others, which you always hear complaints about.The "Cons"?:- The plug is not flush with the surface of the ball, so it sticks out a tad...hardly noticeable, but I'm a picky guy, and I prefer flushness, which my $10 [...] ball actually has on this one. I suppose if I really cared, I could shave down the second plug (they give you two), and try that one...not big enough a deal to me, though.- There will be a slimy, post-manufacturing resin on the rubber, probably part of the production, but also reducing the chances of it from sticking to itself while folded up in shipping. It comes off easily, so it's not so much a con as something about which to be aware.- Impossible to notice on the black model, but I have the 65cm Pearl version of this model, as well, and if sunlight hits the ball, you may notice (or not notice) a few spots on the ball that are darker (thicker) than the rest of the ball, like the increased thickness you might expect to surround the plug for reinforced strength at that spot. I can only conclude that if there are stronger spots, than this excess rubber came from somewhere else it should be, such as distributed evenly around the rest of the ball. This minor flaw may, over time, lead to the demise or decreased life of the ball. However, this issue doesn't seem to affect the feel or performance in any way, so whatever, I guess...this is all conjecture.If I'm not mistaken, the industry leader in quality stability balls is SPRI [...]. However, if you take a look at price difference, and having used SPRI balls many times, I can't justify the extra $$$. Then again, I haven't owned a SPRI ball, so maybe I'm missing something. They probably last a little longer, etc., in a gym setting. Anyway, Happy Shopping!"..." Read more
- SJ Trainer in New Orleans, LA