I would recommend them, I have them in 4 of my cars and just swap the module on futaba 3vcs transmitter depending on what car I'm using,
You can buy them direct at
www.rcecho.com for less than £20 for a module and a receiver
heres the link:
http://www.rcecho.com/product.php?pr...6&cat=0&page=2
Or if you would rather buy them from him via eBay then his id is compassho2005,
Although they are a little cheaper via his site
I'm about to order another 2 for my 1/10th cars,
If you look in the lrp part of forum under "show me your lrp cars" you will see 3 of my cars there and they are all using corona modules and receivers.
http://www.oople.com/forums/showthre...549#post415549