Well I think there are times when the heat is noticable, but I personally have never found it unbearable. There is some heat in the wheel well, but I rarely even notice it unless I'm wearing tennis shoes. The heat from the engine does blow into the cockpit with the top and windows down. With windows up it's not bad at all. With the top up you have to turn the a/c down because it gets too cold. I've heard that both these problems were solved in the Gen4.The Viper's elevated interior temperature is unlike any other car on the road and im sure no one can dispute that. So while it's hot in any convertable when it's hot outside, a Viper's temp is sometimes unbearable.
As for magazine reviews....Bah. It's always that the viper wins in every aspect but they chose the other car because it has cup holders and is therfore superior,,,, or some variation of that. Those reviews are just BS.