Share your experience!
guys, at this link there is the news for the last bugfix-update for xperia sp:
http://www.xperiablog.net/2014/05/23/new-bug-fix-xperia-sp-update-12-1-a-1-205-certified/
LOL me too....but i want 4.4 then...
it's good that they are planning to release another bug fixing update....however i still haven't even gotten the 12.1.a.1.201 update for my sp (C5306) in canada yet!!! 
I hope that they will finaly fix the minilag on 4.3. My screen keeps freezing for a split of a second every 1-2 seconds on the JB 4.3...... very annoying. Also dimming/lightning the display is not smooth at all.
I am using the 4.1.2 on my SP, poor wifi but everything works smoothly.
But, you never know, what sony will do, so it can be anything
i don't even care anymore. i downgraded my xperia on thursday and then rooted it. never thought it was that easy. took all about 25 minutes. now i have a very fast mobile which just works awesome. since 4.3 my xperia was just a mess. i can't believe a new update will bring the old perfomance back and really fix these crappy bugs.