Five years with the Pro and it looked better....impressive. Was the Impreza a DD?
Yes--DD. It was an 80 Km round trip to work 4 days a week with some days further to outside locales.
The Pro came with a lifetime guarantee (as does the Pro+) as long as you went back yearly for an inspection. I didn't bother after the first 2 years so the guarantee reverted to 5 years (7 for the Pro+).
I had it checked before I sold it and it didn't even need a claying. I would certainly recommend it.
Five years ago there were very few alternatives, now there are many and some of them sound good too. I'd be checking the costs, the guarantees, the on-line car forums for reviews, and the applier. Opti-Coat will only sell the Pro and Pro+ to trained appliers.
I bought the "amateur" version (no longer available) after I saw the car and did my motorcycle with it. It wasn't hard to apply to the small areas on the bike but the preparation was not trivial. (Wash, correct the paint so it's glossy and free from swirls and other marks, clay, wash again, dry, wipe down with water/isopropanol mix, and then apply.) The result was excellent, and still is.
Greg