A few have slight shape issues (6-wheel AMG, 991), and some lack details like seat belts (hard to see in closed bodys).
On the AM Vantage and DBS the wheel-tire proportion looks out of tune.
The RWB 993's roof is a bit on the boxy side, the 911's typical greenhouse arc is not perfect.

But overall they look absolutely perfect.
Especially the rims are very nicely done and display superbly with other resins and good diecasts.