Good deal and, yes, worth upgrading to use as a daily driver for sure. It's also pretty fun to do!
Given how little it cost you I'm assuming you have some spare cash for upgrades. If you want a high end and problem free system (with boot screens) I'd recommend the following:
Intel Xeon X5680 3.33GHz Six Core CPU (Cost effective upgrade. 3.46GHz CPUs are overpriced IMO)
http://www.ebay.com/itm/593927-001-...101625?hash=item3d34753539:g:-TgAAOSwB-1YuLZg
HyperX Predator PCIe 480GB AHCI SSD (The only compatible PCIe SSD for the Mac Pro that's still readily available)
https://www.amazon.com/gp/product/B00V01C6M8/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
Apple AC/BT 4.0 WiFi and Bluetooth upgrade
http://www.osxwifi.com/apple-broadc...-with-adapter-for-macpro-2009-and-macpro-2010
EVGA GTX 680 2GB (you'll need a PC to flash the BIOS to Mac Edition)
http://www.ebay.com/itm/EVGA-NVIDIA...402089?hash=item3f766702e9:g:UoMAAOSwax5Yshv1
Flashing guide:
http://www.sugarway.com/evga-gtx680-flashed-for-mac-use/
Sonnet Allegro Pro USB 3.0 PCIe card (somewhat expensive for a USB 3.0 card but by far the best IMO)
https://www.amazon.com/gp/product/B00XPUHO10/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
As for RAM, 16GB may be sufficient, and while I wouldn't go for the link below given the ridiculous high cost, it will give you an idea of what you might need if you wish to max out the RAM:
Transcend 64GB (16GB x 4 Kit) JetMemory DDR3-1600 ECC Registered DIMM 2Rx4 For Mac Pro Mid 2010 /Mid 2012 (TS64GJMA534Z)
https://www.amazon.com/gp/product/B00JIJU9V4/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
All the upgrades listed above work perfectly using native macOS Sierra drivers. Just plug and play! There are no glitches, problems or incompatibilities that I have found and you will end up with a very fast and stable Mac Pro