Apparently there were some data corruption issues in previous versions, but I started with v1.2.1 using the free trial and it's worked flawlessly so I upgraded to the paid version. In trial mode, the only feature that is disabled is the "scheduled sync" feature, so you have to manually sync. Now that I've paid, I just leave it in the background, syncing every 20 mins. It's worked great, no data corruption, no CPU hogging.