Info to pad the thread, for fuller reading.
I got mine from USA, and had to pay import duty, which soured the deal compared with UK sourced.
SmartTop is a control box that integrates with the roof controller to give better roof and remote facilities.
I had one on a previous open-top, and it was the first mod I did to this car.
Functions:
The roof control becomes one-touch, up or down.
The four-window button becomes one-touch for up as well as down.
You can reverse the roof switch polarity, if you find the existing confusing.
Using the remote, you can open or close the windows, open or close the roof (and select if the windows end up open or closed).
Oh, yes, you can fold the roof at non-zero speeds; not a function that's useful with this large sail-like cloth-top but great on my previous folding hard-top.
I find it particularly useful for getting the roof down before rear-seat passengers get in; because the rear window/screen uses the headroom of the rear passengers when folding, you would need to get in, ignition, hold the switch, and then get out before they could start to get in. (Or hold the key in the door lock)
Oh, yes, because it's done on the fob and not ignition, you can be getting ready to drive (not having to hold the switch or the key), and you can start the roof whilst you are still 20 seconds away, so you can get in and drive. Similar for locking; arrive, and walk away whilst it folds up behind you! (Only thing you can't do is use the boot; interlock there will stop the roof function)