Glad this topic came up again -- and I know there are a zillion threads on the topic already.
I was fortunate to be given a Garmin "Nuvi" for my travels, wondering if anyone knows or has used the Bizer chart in that specific model (SDchip). It's the perfect size for our boat (and you too TimmyG).
.............. and yes, as I have sent an inquiry off to Bizer as well -- the forum friends here seem to be typically quicker in responses