I have bought many times at sheinside.com and I'm always satisfied.
The last time I took advantage of the 70% sales and I' ve bought a lot of items, even if normally prices are convenient and items are really fashion.
Shipping times are fast in case of express delivery, otherwise, choosing the standard one, you should wait for some day more (even if the standard delivery is often free, so it is affordable).
Once I've ordered a wrong size and I wanted to change it with the correct one, having 30 days time to make the return, and also in this case I had a positive experience.