I love this Ping, its been one of the most fuss free thus far, seems immune to mites and best of all, it can go purple under relatively low light levels. Check it out:
This is under T5 lights, which as CPers would know, can get D. falconeri and various other Pings and Drosera to go red.
Not very impressive, huh? But this is in bright shade. It was a darker purple a few months ago when the weather was warmer and it wasn't the current gloomy weather.