I recently bought a sweater dress. It is form fitting down to my kneecaps. It is sooo comfortable! Probably the most comfortable feeling ever. I wear it with a pair of leggings or tights.
All I can say is I wish I can wear it outside my house. Other then my family knowing, (and it's DADT) I am pretty much in the closet. Except I do wear women's clothes but in a manner not highly obvious.
In other words, wearing this to the store probably isn't happening.