So I've had the Sensation for about 5 days now - including a weekend away and thought you might be interested in my latest thoughts.
I'll start with the screen. Coming from my Desire its clear the screen initially dissapointed me. The viewing angle wasn't as good, the colours not quite as vibrant. Infact I considered sending the entire thing back and sticking with the Desire. But no, I decided to stay with it and see how it went - and I'd send it back after a week.
With the Desire having been powered off for 5 days now the memories of the direct comparison between the two have faded and, actually, in isolation, the screen is 'fine'. Yes, 'fine'. I'm not going to say its outstanding because we know its not, and the screen on the Galaxy S 2 is undoubtedly better.
But the key point here is once you get out of phone-review mode where you are comparing everything to everything out and get into phone-user mode most of the screen criticisms, however valid, quickly become quite irrelevent.
The qHD display is actually very nice for web browsing - superior to the lower resolution screen on the desire - and in general use the screen is clear, crisp and pleasing to use.
Much like the rest of the phone really. I have experienced no lag and no slowdown. Everything is perfectly snappy and speedy - more so than the Desire despite Sense 3.0 being apparently 'bloatware'. From a pure user perspective I'm actually really beginning to love the Sensation - the larger screen is a joy to use for texting etc.
I particularly love the look and feel of the device. It's nicely weighted, its solid to hold, it looks great and it feels like a premium class device.
Overall I'm very happy with it and shall be keeping it.
It could, however, have been the undisputed champion of all Smartphones had it been fitted with an AMOLED screen. As it is, Samsung Galaxy S 2 v Sensation will remain a bitterly fought fanboy contest neither side can really win.
For me, all the other plus points of the Sensation make me convinced it's the better phone than the Galaxy S 2 despite the screen. Thats the thing about phones - its personal opinion.