I have a pair of '08 Invaders, bought them used off of Craigslist back when I first started getting serious in the park. They were in pretty good condition when I got them and used them heavily for about 2 more years before they started to show their age. Top sheet still looks great but edges on the tips and tails are starting to split (probably reasonable from banging into walls and stuff doing urban). I was impressed and last winter found a deal on the TW pro and got those. Used them for about a season and a half (90% in the park) and edges still look good, topsheet is pretty worn near the tips and tails and can start to see the sidewalls where it has chipped along the ski, so not as impressed there. Not sure if my next pair will be Lines, but ive had a good experience with them so far.