Overall, this hole digger is great for the price. It has plenty of power to get through all soil types that we've tried, but like any auger, it will stop (or spin you) if there's a large rock or strong root that it can't get past. It's pretty easy to start (couple pulls max) and runs very well. But there some some definite oddities and it's clear where some corners were cut.
For the cut corners the most clear one is the throttle housing. It's somewhat easy for it to slip off and become unattached, so you'll be able to start the machine but hitting the throttle does nothing. It's easy to get it back on track, but there's nothing in the design that's specifically to prevent it from happening.
The biggest oddity is the exhaust. You really have 2 options: hold it awkwardly and the exhaust blows out the opposite side of you or hold it more naturally, and the exhaust blows directly at you. There might be a way to change where the throttle is to help rectify the problem a little bit, but really - the exhaust should have been downward facing and off to one side - given the handle, it's clear where people will be holding it, and thus, where their body will be.
We plan to put in around 50 of the steel Lifetime fence posts, and if this gets through them all at this price, it'll definitely be worth it. It's made it about halfway through without issue thus far. The holes are a great size (and you have two options, depending on how big of post and/or how much concrete you want to use), so quite versatile there.
Overall - would recommend for a homeowner doing hole digging from time to time or for a big one-time project. For professionals that would use it frequently, there are likely hole diggers with better overall design and ergonomics.