Can anyone swear by it?
Cos I seem to be swearing at it. It stinks, it's expensive and so far it's useless. :
Works great, it stinks though. Works great on stickers and such, grease marks, I do pretty much everything with it except for hardwater marks.
I would recommend taking a air proof plastic container with you, put the cloth in there afterwards, otherwise the van stinks the whole day. Don't forget to take it out though, otherwise it will stink even more in time lol.