anyone tried Auto boot/trunk release springs?

[treeman]

I've often liked the idea of auto trunk release and see there's a few sellers on eBay etc who advertise these little springs that fit onto the rear boot lid struts that push up enough that when the boot release is activated from the remote or dash it should pop up - has anyone tried them and found they work?

The listings say they might not work if the struts are old or leaky - makes sense I guess as you need as much upward pressure as possible.

listing.....

BMW x5 e53 Automatic lifting of the boot lid TUNING BMW x5 e53 | eBay