I have flashed most of the JB roms, rooted, and swapped Ext_sd to sdCard. RAM has increased from 550MB to 620MB. The interface is good with little lags. However, opening apps takes time (Contacts, Phone, etc.) And the most annoying part is frequent hangs during movie playback and video playbacks in youtube and facebook. I downgraded to GB and updated to the latest and I'm so happy watching movies while on the move and watching youtube thru wifi. (Even listening to mp3's was problematic with JB). What are your thoughts? Thanks.