I'll ditto what slim said about the LAVA fuel. It is very hard to get and I've always bought 4-6 cans of it at a time when I had the chance. That said, I don't think the new LAVA made by pyroproducts does quite as well as the original made by volcanic trading.
My continuing problem with Colibri is consistency. I have some that have worked fine for years with no problems, and I have others that have never worked properly after exhausting the first tank of fuel they came with. My experience has been that high-end/low-end doesn't seem to make a difference. Either the lighter works properly or it doesn't, no matter what I do in terms of purging, maintenance, care, etc.
To borrow a line from a movie, it's sort of like a box of chocolates; you never know what you're going to get, a good one, or a bad one.
Just my thoughts............
BTW, I agree the warrenty is a joke. I once had a turn-around time of almost nine months after I mailed one in (the "repaired" lighter worked just fine until I exhausted the fuel already in it, and then I had the same problem of it not lighting, after that).