I use a HSS vest it's fine but I like the looks of the spyder system,but like Bowwild said, it's a little pricey. Don't forget to get the linesmen rope. Most of the falls occur while climbing. Also learn a the prucis knot, slips up a line until there is pressure on it. I probably spelled it wrong. My brother fell a couple of years ago when a old climber cable broke. He was hurt badly but was able to recover, we use a harness and linesmen belt now.
Not matter which you buy, USE IT