If I were to go back in time, NO!
The out-of-the-box DNS-343 is crippled, I believe it's mainly caused by the official firmware. I've wasted many many hours of sleep and worrying about losing my data. The potential of losing my data was because I didn't buy with all the bays filled and adding new harddisks were a nightmare. It wasn't very Mac friendly, performance was slow, not able to use with Time Machine and initially there were some write access issues (which was subsequently solved by a Mac OS update). In addition, I've experienced more responsive tech support.
Having said these, if you're familiar with the UNIX shell or willing to learn about shell (not that difficult, if you've been a DOS user) and trust that there won't be any problems during the warranty period, then beneath the firmware, there's an excellent hardware, brilliant Fonz Fun Plug (FFP) community out there to answer most of your queries.
With FFP, adding new harddisk isn't a big of any issue anymore, performance is so much faster and the DNS-343 is working well with Time Machine.