From what I heard (I never bought them!), the Signal's weren't that much cheaper that Ervo's or TL's.
I only ever used Signal's as AR. The handles aren't nice to use at all.
In terms of the receiver, it doesn't vibrate, only beeps. It's also an incredibly confusing receiver, as I've witnessed the numerous occasions I've watched ref's try and get it ready.
Range seems to be okay, likewise battery (never had it stop working mid-match)