Ain’t none of them worth a sh!t. I’ve had the cheapos and I’ve had the high dollar commercial name brands. 2-3 years at the most is what I believe you’ll get out of them. Might as well buy the cheapest one on the shelf, which right now looks like it’s going to be a battery powered one.
Use the proper fuel in them, premixed, and you never have an issue. Mine has a fitting on the back that allows me to use a drill to crank it. Came in handy after shoulder surgery. Cranks right up every time. The drill forces the issue and takes all the hard work out of it.