Does anyone have any experience of one of these that actually works.

I have tried two different ones from Argos. The cheaper one gave a
reasonable picture provided there was no one in the way but did suffer
from interference. Because of this I traded up to the next most
expensive which I assumed would be better but, unfortunately, I
couldn't get any reasonable signal once I was out of the room with the
transmitter and, when it had to go though two walls, despite only being
about 12m away, it was completely unwatchable!

I have a wireless network but changing the channels on both the sender
and the wireless router didn't help. I also have a dect phone but I
would have hoped that many people have both of these and any useful
sender should be capable of coping with both.

If anyone can suggest any models that they have found actually works I
would be very grateful to hear.

many thanks

David