I picked one up at a Consignment sale on a whim for morning runs to the bus stop.  I didn't realize when I bought it what a great suit it was!  We use this for everywhere we go.  If I don't have mittens for my son, I simply just flip over the hand part and voila-no worries!  Same goes for the feet.

Another reviewer had commented on the weight of the fleece.  It may not be a heavy fleece, but there's no doubt it keeps the baby warm.  This isn't meant to go out and play in the snow for the day.
This is also perfect for use in the car seat.  There are so many safety concerns with using bulky coats in car seats.  This eliminates the issue of having to take the coat off to buckle your child up and put it back on to get out of the car.  Seriously, one of the best investments I have made.  Not to mention the compliments I have gotten on it.

I am trying to think of something negative to point out about it but I have nothing to say.  For once, this is a great quality item that I am happy I spent the money on.

Also wanted to add, someone else commented it runs small.  I have not found that to be the case.  My son is tall for his age and is wearing the 24 months size (usually wears size 2T)  and there's plenty of room, even with the hands and feet folded over.