Personally I was a Spideroak customer for 2 years or so and moved to Tresorit after the canary thing. They offer very similar features but their apps are a lot better. Spideroak always felt quite clunky. Also, the servers are based in Europe.

I don't think either is great to use with lots of data as upload and download seem quite slow, but for my use case of just storing documents it is fine.

They are located in the united states. That alone is more than enough to push me away.