I've been to Babes in the womb at the airport twice ow, once at 8 weeks and once at 17+1 for a gender scan - both times were really nice and the place is lovely (you even get a cup of tea/coffee and there are biccies and sweets to help yourself to!!)
We will be going back for a 3d/4d scan at the end of next month - also if it makes a difference, Babes in the Womb do a deal where you get the next (2d) scan for £49.50 once you have been this pregnancy, or 15% off 3d/4d scans.
No experience of babybond but I've heard only nice things about it