Re: Not worth it
I also have a Nexus S and a HTC Desire. I bought the Nexus S as using GPS on the Desire caused it to overheat and constantly restart.
I have to say I'm really impressed by the Nexus S.
I've downloaded all the widgets I want from the marketplace. Although the Nexus S is plasticy the build quality seems goo enough. I've not experienced a single crash or reboot.
I've had to restart it a few times because it starts pausing when switching home-screens, but that's all.
I find that I get signal on my Nexus S where I don't on my Desire, the screen is better and the loudspeaker sounds far less tinny.
All in all - I find the Nexus S a great phone and the first smartphone that I've been truly happy with. Each to their own though.