Great little impact wrench, I have the Sealey ratchet wrench (from FFX as well) that takes the same batteries. Bought the kit that came with 2 batteries so thought I would add this.
The ratchet is great for small spaces and "feel" but this is excellent for speed. At 80nm you are not going to be pulling wheels off but it should cope with most smaller fastenings - it's 3/8" after all.
It's pretty light and handy, not run out of battery in anger yet, feels like a solid bit of kit.