I got the mini-lip injection (Vancouver does it, haven't seen anywher else). Loved it - went in for a top lip and the nurse said my lips were even and that most people who want a fuller looking lip just do the bottom. She suggested I do both otherwise it could look uneven with just the top. She brought out two needles (0.4CC costs $135, a full 1CC is $500) and did the bottom first. I loved it. I also arrived an hour early to put on the numbing cream and it was amazing, I felt nothing save for a dull pain that lasted 3-7 seconds at most. I was so happy with the result, I said I'd hold off on the upper lip until next week.
I'm on day two. It's a little sore if I touch a certain spot, it's also a little lumpy but you can't see it, I only feel the lumps if I run my tongue across my inner lower lip OR if I purse my lips together it feels a bit sore and icky so I''ve stopped pursing my lips together. But so far, I'd say it's been a decent experience, I'm totally addicted and I'm 95% going back for the top lip next week!