Well - I used this a few weeks ago. A work laptop with Mint that I wanted to load with Kubuntu. Refused to recognise USB boot (can't blame the laptop - I quite like Mint myself). After running this laptop said "no boot disk" and I thought "Ha ha - can't refuse me now" - only to find that Mint had left behind a shim (like a dog leaving behind something you step in) that I had to get over before finally installing Kubuntu.