My car is through Saga, my caravan through C&CC. Both are as good as any. I like SAGA as the documentation is clear and they give unlimited EU cover. The C&CC gives me about 240 days for the van. I may change that one to SAGA as well, but usually apathy sets in and I just fill in the the renewal slip. When I received the SAGA Car premium this year it had gone up 10% so I tried one of those on line comparison sites you keep seeing on TV adverts. Yes, it gave me a lot of prices lower than mine, with Companies I had never heard of, but when i actually checked what I was getting from SAGA and added back in all the opt outs that the on line sites gave, it came out pretty much the same. I still believe there is no such thing as a 'free lunch' and you will pay the going rate to get what you want.
For many many years I used the CC but 'dumped' them as I found out they were very expensive, and did not really care too much. Their renewal documentation was so unclear, it took me several years to find out I was being overcharged excessively. I also naively trusted them to have it right so did not chase it as hard as I should have until latterly. Of course the CC used an agency, and this may have been the cause of the issues, even although their name was on the letterhead. When I did eventually query everything, my premium dropped by over 60% but by then, I had had enough and moved elsewhere.
You should shop around, but as mentioned , beware the online comparison sites. Also, probably every Company will give you a 10% discount on any quote as a new customer. This will disappear on renewal, so you may have to be a 'rate tart' to keep getting it.