I hate regular spanx, but I have to say that the preggo spanx are great!  They're comfortable (unlike non preggo spanx) and they feel very supportive.  As I get bigger I actually feel more comfortable in them because it feels like they're providing support to my belly.  The leg part is a little bit long for me (5'3") and when you roll up the legs it become significantly less comfortable.  But other than that I really love these.