The TLDR:These wheels will not hold you back, if anything, you will.The Long Summary (which I think you should read):Wow. These wheels and bearings are bliss in a package. I've had my old wheels for about 4 years so you can imagine the wear and tear. Grimy bearings, busted wheels, and gritty, noisy rides. I decided I needed to bite the bullet and invest in some new wheels and bearings- man, am I glad I got these.When I first got my package, I was dismayed to find out I had only received 7 wheels. I couldn't skate with 4 wheels on one foot and 3 on the other... believe me, I've tried and it's not too fun. Maybe the 8th got lost in shipping or was never put in the package in the first place. Nevertheless, I contacted the seller, letting them know I only got 7 wheels and asked if they could help. They got back to me in 2 days, apologizing profusely, promising me they would send me my 8th wheel ASAP. Sure enough, a few days later, I receive one single wheel, therefore completing my purchase.I assembled the bearings in my wheels, which was a breeze by the way, and installed them into my rollerblades. I went outside to test them out... oh crikey. They were amazing. The wheels glided silently. The bearings were well oiled. Not to mention the increase in speed. The time it took me to go from a static position to a fast cruising speed was cut in half to what I was previously used to on my old wheels. I had just enough grip on the pavement. My skating playground is the city- sidewalks, roads, cobblestone, ledges, ramps, you name it. The wheel hardness is just right for me to make sharp jab turns and not slide out but is slippery enough that I can easily switch into backward skating with ease. If you're a fan of jumping over things, on things, or down things, these wheels are the ones. I have never had any issues with sticking a landing. I've always felt secure, regardless of how smooth or rough the pavement is. For reference, I use K2 Sports Women's Andra's Fitness 2012 Inline Skates.I must admit, I was a little dubious of these wheels because I'd never heard of them before. I'm quite picky; I didn't want to dish out a big chunk of money only to be riding on some cheap, plastic wheels. I wasn't sure if they would hold up. Surprise, surprise- they have. I've had these wheels and bearings for about a month now and I've gone out rollerblading at least 20 times (two of those times in the rain). There are no cracks or signs of fragility in the wheels themselves and the bearings are doing a wonderful job of keeping out the tiny rocks and grime. Just thinking of these wheels makes me smile.Heck, I might just go for a rollerblade ride right now.