I have a total of 6 angle grinders of various sizes. I been using the same 5" Makita grinder for 10+ yrs. I've had no issues other than changing the brushes once. My 7" Makita is about 20yrs, also have a 20pounder I got at a garage sail that must be 50yrs old, its slow but you can't stall it out. A Dewalt 4" and 2 Can tire brand 4"ers(Can box store Chinese crap) All have different uses, saves time which is money. Cheapy tools are ok, can't say I've burnt any other than a IR I bought in 69'. Buy what you can afford and more than one if you can. My $0.02.
