IMO as long as the riser has 2 things then its a good riser.
1 - Tiller Adjustment
2 - Limb Alignment Adjustment
Some cheap risers do not have this and I will always advise to avoid this.
If the riser and limb combo is not straight, if you do not have the alignment adjustment then you will have to shoot with a bent bow.
The Cartel Fantom appears to have limb alignment adjustment so I would say its worth checking out.
However be aware that (as far as I know) this is the first attempt at a proper riser from Cartel so it may not be up to the quality we normally would expect.
"One shall stand and one shall fall!"
we have one of these as a club bow bought as a tester, everyone is shocked by its performance it way out performs everyone's expectations, it was recomended by our coach and i have just ordered one for my girlfriend
It looks very similar to the FANTOM, which seems to have had just a slight redesign from it and a cheaper price which has got to be good!