It's going to take longer than an hour the very fist time. You think everything will line up perfectly every time? Think about the gaps between the parts. Let's not forget about the electrical wiring. Norm, please chime in and tell people how involved this process is. A few hours at least if you care at all about lining it up properly and making the gaps all the way around even. You better have at least another person helping you too. This is not a one person type of job.But we're not talking a lengthy conversion, it's just swapping parts, without any permanent modifications. Less than a hour each way. Worth the versatility to me.
When I had my Porsche Boxster, I bought a similar top that made my car look like a Cayman. Bolt on and removal of the rear trunk. It worked the same way. Let me tell you, it was heavy, and a PITA to switch out when ever you felt like it. These types of top are for leaving on for long periods of time. Not for switching out every other day. Like I said, it's better to leave them on for the season. Or great if you want one for road course racing.