I considered buying a Q-cut - but as a beginner my experiences with carbide tooling have been expensive - indeed I recall threads here on how HSS was a benefit.
I had no desire to spend money on an expensive tool if it was likely to go the way of my other parting tools.
So I recently made a rear toolpost and at the first test parted off half a dozen discs from a 1" bar which i hadn't managed to do from the front at all.
Perhaps now I'll think about a Qcut again and put it at the back.
Russell