Update:
Recently, out of curiosity, I tried out these Pipo stock roms ( found them in Freaktab ):
1. M7pro_#70_update_OTA-20131130-v1.0.6 ...this rom comes with quick boot ( boot in 10secs vs the usual 45s )
2. M7pro#128_892_new_ui_ZH_20140219...this is latest with new UI
Other than the cosmetic changes, I found them to be quite buggy, and performance seems to be worse off...GPS affecting my Sygic app losing connection intermittently , WiFI weaker, battery life shorter.
I am now back to the Pipo Sep 2013 firmware ( been on it since it came out ), which has been the best and most stable for my tablet, ..... my Sygic navigation is back to normal, and works flawlessly without lost connection.
No problems with this tablet so far
I find this app...Infolife's App Backup & Restore very good for my non rooted tablet.. in case you want to try out other roms.