Roof Tents, anyone got one?

Hey forum, has anyone got a roof tent and got any advice or helpful pointers on them? I’m mulling over the idea of either one larger or two smaller ones for kids “bedrooms” on top of a LWB? Does this sound like a goer? Any pitfalls or positives if you’ve done this or similar? Cheers in advance all!

No one given it a go? I’ve seen bits that may need a longer ladder than they can provide. But not much else out there.

Sorry for not replying sooner although I'm not able to offer any advice except for suggesting having a pop-top fitted to the van.