I spent some time this week sitting in an Aventador and getting a full tour of it. Didn't get to drive or ride in it though as pre-sold. The car is really nice. I'm not much of a Lambo guy normally, but I must say I liked the styling of it quite a lot. The one I saw was white with black and carbon accents. Sweet. The interior is pretty cool. A bit aircraft feeling, which I liked. Not quite as stylish or high quality feeling inside as the 458 in my opinion though.
While the interior is more spacious than any other Lambo I've sat in, it was still a bit small for me in terms of head room and leg room. At 6'5" I could have used 1" more of headroom and maybe 2" more of leg room.
At $406,000 MSRP, it's hard for me to justify the value. One could almost buy a Ferrari 458 or a McLaren (maybe MSRP of $275) and a used GT (maybe $160k) for close to that.