There is a long thread about wheels. IMHO these wheels are not high performance wheels, these are more for people who like to cruise around the city on roads that are not always perfect smooth asphalt, yet doesn’t want to bother with pneumatics or their board can’t upgrade to pneumatics. Cloudwheels did have some issues in the past that are not 100% fixed with newer version. And the core is not abec-style which makes it harder to find pulleys if used outside the kit.
This kit might be cheaper directly from Flipsky (they will even send you 5% coupon to email if you leave things in your cart).