Yup, its like a Zed concert hall in there, now you see where all the noise comes from I originally did the boot, and tbh it didnt make a lot of difference so I ripped apart the rear bit you see there. Doing the wheel wells in there, which you cant see in the pic, makes the biggest difference. Best thing to do is go around tapping and find the flimsy panels and do them first. I added more than is in the pic, but only because I had the matt left over. You could do it with quite a bit less and still get good results. Also make sure you have some kind of foam to put over the top to stop airbourne noise as it can reverberate around a bit in there.
I beleive doing the doors can make quite a difference too, but havent got round to that on mine.