i had the 12 week NT u/s and the 19 week u/s i LOVED seeing her jump around in there and id do it the same having my time again.. and if i have another i will def be doign these scans again.
i also had one at 32-33 weeks (cant remember lol) but my mw was like " you wanna see bub?" and wheeled in a portable u/s machine and i was liek "hell YES!!" haha

i couldnt go the whole time without seeing my baby!! I think it makes it a little more real, esp in the beginning when you cant feel movement and such.