My first week has been damned good. The people in my department and immediate team are really nice. I think that this is always my biggest fear when I change job - will the people be nice? I'm glad to say that they are, and this includes all the managers with whom I've had contact.
Similarly, the knowledge and talent of everyone I've come across has been impressive. These are seriously clever people. Having to understand real IT issues as well all the ins and outs of the complexities of 3G networks means that everyone there is top-notch.
I already have a career plan and know what is expected of me and how I'll be measured.
Plus we went out for Thai food on Friday which rocked! :-)