I got this unit to break some welded joints in a large metal frame that I was scrapping, which gave me an excuse to invest in an angle grinder.
Outside of safety gear (which you should make sure you have before using it), the unit comes pretty much everything you need to get started, including a grinding disc. After you read through the manual, it's straightforward to set up and use.
In terms of pricing, this product was on the lower end of name-branded tools I was researching, so it doesn't have some of the niceties that more expensive products have, namely a carrying case. For me, that's a forgivable omission given the lower price.
What I did appreciate is that this product had a paddle switch at its price point. I care about safety, especially as a newbie to angle grinders. When you release your grip on the paddle switch, the unit turns off. There's a locking mechanism to prevent you from accidentally turning on the unit too. Nice.
In the end, I thought my small cutting project would take an hour, but I was completed in about 15 minutes. Granted, my estimate was based on never having used an angle grinder before. In any case, I'm very happy with my purchase.