Do not buy your gas powered things at Home Depot or Lowes if you want one that is more likely to last.
Buy Stihl or Echo, in that order, and buy them from a dealer. There's no reason to buy Echo from Home Depot...the prices are the same, the products are the same, and even if it's on sale, the dealer will match, and he's the guy you're going to take whatever you buy for service.
The really sad part is that Homelite used to make machines that were absolutely bulletproof. Until the mid-1990s, Homelite was largely focused on commercial equipment, but they got sold to John Deere, who moved them into a more consumer-focused model, and then to TTI, a Chinese conglomerate that also makes Ryobi, at which point the Homelite name started getting slapped on pretty much any old junk.
ZV
Not sure why curve is so popular....must be cheaper to make.
I don't know if its cheaper to make but the curved shaft is a comfort/ergonomic thing. At least I think so. I might be wrong.