App gets very slow. Sometimes I have to close the app when it freezes which then makes me lose all my progress, unless I've put it in my cart. They also have counterfeit products, so I never know if I'm getting the real deal or not until it arrives. There's a lot of fake reviews trying to scale the product up or down, so it's hard to know if it's a good product or not. All this to say, I'd say it's still worth having to use once in a while just check other places first for a product.