ORIGINAL: aerobear
From all reports this is a great product backed up with great service.
On the other hand, for the $45 purchase price you could instead get about 1400 of [link=http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/1N4007/?qs=ZbYWOjW8mGpgsSEErKxdmfUH0OoFY7oB]these[/link]. That's enough to equip 700 planes with a ignition voltage reducer suitable for LIFE type batteries. If you only need enough for a few planes then your local electronics shop can set you up for a buck or two. Using these with a separate ignition battery will increase your plane's weight by a few ounces over the Ultra IBEC. If that's a problem then there are usually other, cheaper ways to save that much weight.
Nothing wrong with either choice, just letting you know there are choices.
I pay seven cents a piece for them at my local surplus electronics store. Just walk in, get a handful for a quarter and out the door. I then use the extra power cable supplied with the DLE engines to splice it in and hook up to the switched side of my switch.
Some people like to have a ready made product but I like to go DIY when I can.