As said by others White Waltham is a great place, very friendly.
Havent flown in there for a while, but never any problems. Just remember its not Full ATC, so if no one answers, just continue with the procedures, overhead join looking for which runway is in use. And when you leave, dont expect someone to answer when you say ready for departure. Its up to you, look out and line-up and take-off when you consider it is safe, just announce your intentions for those that have a radio.
Have a good flight!