I must be one of the lucky ones. I use Quicken for Mac 2005 (and previous versions) and don't have any issues. Sure, it's not perfect, but I don't get errors matching balances, it tracks multiple accounts, and easily handles the debit card transactions that are listed as addresses only (automatically categorizes them and assigns a known payee).
I like using it, and they keep sending me "free" upgrades because I use their bill pay service, which has also been very reliable for me.