Anyone use hatch support springs?

In the hatch support discussions, I haven't seen much about hatch support springs. Austin Hardware sells several. I was thinking about using them for several reasons. They won't put as much load on the hatch when closed as a gas shock type. and they wouldn't release if a gust of wind raised the hatch like an un-pinned starwheel type would. Clearance wouldn't be as much of an issue either. They come in a 45 and 100 lb rating, some have cables inside to prevent over extending them. So, wise ones what's the down side?
Steve

Steve