Avoid at all costs is my advice

I had one on my Mk4 van years ago

The mould was twisted so it never fitted correctly and used to flex and jump open all the time

You cannot use gas struts either as the door isn't strong enough to support them and trying to get a decent selenoid that is reliable is another matter

The hinges used are not the best and can bend with the weight of the door

they also need to be welded on to avoid coming loose or flexing

The standard steel doors would be my choice every time from now on

They look good but fibreglass is weaker and ripples and is easier to break into

Here is mine