Yep - did one with DD and doing one with DS when I'm 29 weeks.. She said 26 weeks is too early.. they're still super skinny so she wanted me to wait till he had more fat on him. But TOTALLY worth it! We're getting one hour.. all the prints we want in BW and color.. and all pics on CD and a video of the whole thing. We're looking fwd to it!
I have done 3D/4D u/s with both the boys at about 29 weeks. I loved it! They dont always cooperate though. First one did, second one was kinda dissapointing, he slept the whole time and didn't show much. I am considering doing it this time too but not sure with not knowing the gender, afraid we might find out to soon so I'm not sure yet. I'd say 26-29 weeks is perfect. Alot of people like to do it later so you can see a much more formed face, but sometimes they are to squished and you cant see much.