Warning Xperia user! WARNING!

"Updated – comment from the Developer World team:
We we would like to clarify that above mentioned “challenges” have already been addressed by our SW engineering teams. For instance, we have not only optimised the RAM management by making the RAM usage for internal apps as good as possible, but we will also introduce a Performance assistant at start up when running ICS. In this Performance assistant, you can enable and disable certain services that you might not want to run on your phone, in order to optimise the performance of your phone.
We have also worked with quite a few partners in regards to architecture optimisations for SQL handling. In addition, we have also optimised the hardware usage. And as a result of this article, a number of app developers have notified us that they are evaluating if HW optimisation will be needed or not for their apps.
The aim of this article was to share our knowledge regarding the different characteristics for ICS and Gingerbread in an open way, as we strive to have an open communication with the developer community. All in all, we would like to point out that it’s our clear aim to deliver an as good ICS update as ever possible. As you might have seen on the Sony Xperia Product Blog, we’re not far from releasing it now. Thanks for all the feedback!"
Source: "Learn about the technical differences between Gingerbread and ICS [Updated]": http://developer.sonymobile.com/wp/2012/03/30/learn-about-the-technical-differences-between-gingerbread-and-ics/

But the real deal is coming from the (disatisfied) users themselves. I have read most a lot of these posts and ICS is not getting favorable review is any.
For more info please read this Xperia blog thread for ICS: "Your thoughts on ICS update": http://talk.sonymobile.com/message/182372#182372

Some of the major issues expressed by many are as follows:

-Home Launcher is buggy [Lags when scrolling between screens]
-GSM and 3G connection problems.
-HD Games experiences Graphics Glitches
-Video Camera recording quality decreased. HD has a framerate problem, and no stereo sound.
-Phone Dialer needs takes 3-4 seconds to appear [Even After a fresh Reboot]
-Battery Drain
-Wifi connection problems. High drop rate.

So is ICS worth it? I think it is obvious that a new update is needed to fix these problems. Til then I will stay off the ICS. I am very happy with the way my phone is currently working, and I don't mind waiting for a new fixed version.