I've had problems where it loses my settings after update. They also don't sync between devices, making them quite cumbersome for me to use (you can copy the settings manually though).
When it's all setup it works great though.
When it's all setup it works great though.
I would second this, it took me a while to troubleshoot this problem. If you don't use Sync, then it might be irrelevant.
I also use Tab Suspender to reduce the footprint, the 'suspended' tabs also intermittently fail to sync.