Depends on what you intend to race. I have a 3VCS bought specifically to reign in my 12th scale (on asphalt) and it did a fantastic job - I really struggled with a normal radio, but I could get round quickly once I switched to the 3VCS.
I have also used it with my Hyper 7 (bashing only) where it's too much radio for the usage, and my touring car where again, it really helped because of the signalling speed and precision.
TBH though I now race off road and I only use 10% of the features (EPA and dual rates on the steering as the track changes during the meeting) - if I were to start again just for off-road I'd buy the 3GR and spend the rest of the money on a decent servo and a heap of spares!
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