So my new best friend is right there, pictured there to the left. You have no idea what it's done for me. I've got 10+ years as a modeler and a gamer without a set of sprue cutters until my wife so kindly went and got me some.
Let's just say, it was amazing, I took that unopened box set of Space Hulk (no worries I've played it, with my friend's set) sat down on the couch with what ever was on TV at the time and in less then an hour had all the models clipped out. Let's just say it was nice not stabbing myself with a knife and hunched over a cutting board.
For anyone who hasn't gotten there hands on a set of clippers, run over to your local hobby store and pic them up, well worth the 10 dollars you'll spend and you'll end up going through quite a few less blades on your knife, and you won't end up breaking the tips off either :D
The only shame was going back and cleaning up where I snipped with the clippers, but I usually have to trim extras off when I use the knife anyways. Let's just say I don't usually do as many models that are in the Space Hulk set at a time.