satnav advice please

[Straad]

Hi Everybody. I have an old built-in Kenwood satnav/radio/cd thingy in my Cali which is so old that I can no longer get map updates for. The rest of the unit works ok so I don't want to replace the whole unit. I want one that I can either stick to the windscreen or dashboard. I saw a blog which was about specialist satnavs for Campervans and the one that was being recommended was the Tomtom GO Camper Max. It occurred to me that these might be aimed at bigger campers than the California but I thought I would ask if anyone has any experience of these (or any others) before I buy.