I've (fairly) recently bought myself the Kincrome version of this one (having finally killed my eBay cheapie) and i'm happyh with it's performance on the bigger end of the scale.
My grizzles with it are
- being a heavy-handed sort of bloke - i've ripped the guts out out a few smaller (up to 6mm) nutserts because of the massive torque you generate (see "heavy-handed")
- space. It can be a PITA to get into righter areas
That being said, i'm pretty sure i've got one of those ones that go onto your impact driver *SOMEWHERE* in my shed. That'll be easy to find then.....
I'm with Jon (g'day old fella, long time no hear)
I also have the kinchrome large handle lever type. You have to be very gentle setting smaller rivnuts or you will pull the guts out of them and damage the supplied madrel. But they are ace on the larger ones. M6 or bigger on the rivet gun type is a chore, particularly if using steel over ali rivnuts. The other disadvantage as stated. - you need a lot of real estate for the large handle type, but they set m8 and 10 with ease.
The minserts linked at austrltools look interesting indeed.
Just be wary of rivnuts. Any corrosion between bolt and rivnut and you will likely see the rivnut spin in its hole. My solution to that, create barrier protection by lubricating the bolt well and use serrated flange rivnuts.