By all accounts I'm under the impression that it is a good unit, i have been to sennelager a couple of times but not for a while so i'm not too sure what it will be like once you get there, sorry i can't help anymore than than that but hopefully you won't be worrying too much about it.
i was there 02 was the best unit i have ever had the pleasure of serving at seriously great goes by the old saying "work hard play hard".
heard its gone down hill a bit but its what you make it and whos there. was full of nut cases then so made it even better.
day to day works like what you would normaly do anywhere but if it hasnt changed too much you will be away a hell of a lot and on exercise a lot.
hope its not changed too much for you ENJOY
Best unit I was at, 2001-2003. Very hard work, sh!t blocks, strip is crap, you get the crap kicked out of you most weekends by the infantry, lots of exercises/tours etc, you'll either love it or hate it.
Make the most of it and don't turn into an alcy going to the Senne Eck all the time, get some mates together and visit places at weekends, loads to see and do in that part of Germany.