Yes, there is a slight lift on the right. I couldn't live with a gap and am worried, that once stuck, it's there for life - although I'm sure there is a removal technique if it came to it. It does make the rear end look much more beefy I must admit. If it was a 100% perfect fit that you couldn't get wrong, I'd be more confident!
- Just for clarity - with the use of a clamp overnight, there is no lift or gap on my spoiler. It looks absolutely flush with the boot. I wouldn't have left it on if it had a gap. Go for it!