electronic mozzie repellents

[vicky/liam]

Has anyone ever used those plugin frequency wave repellers before?

We've got the type that you put the tablets in (which we have found do the job well enough)  but we need to get at least 1 more for my mother in laws room. I was wondering if its worth getting the other one to save on tablets in the future.
If they are no good and you get eaten alive with them will someone please let me know.

love Vicky xx