I have a Poulan Pro pole saw with a pp1000 edger attachment that worked great the one time I've used it. I've been able to maintain the look for the rest of mowing season with a string trimmer.
I like it but the short warranty would make me think twice. They could at least give a one or two year warranty. Does the GW come with a better warranty?
Most of the bolts on a bear require a 10mm socket. You would likely need a 19mm if you change a bear's tires. I'm not sure if a 357 would ever be needed unless you've lost the 10mm again.