I bought the GAHH top and had it installed here in So Cal last month. Just wanted to mention how pleased I am with the new top. It takes a little while to get used to the smaller rear window but the bliss of not having to worry about the plastic rear window and clearer view of what's behind me more than compensates. The top came with a nice water-repellent coating on it as well.
I paid about $500 for the installation, which took a day. The installer properly recommended to leave the top up for at least 10 days so it has a chance to stretch out.
I have had absolutely no problems and am really glad I made the investment.