Margarine is a sore subject with me ever since the #%*#@* co-op discontinued Willow Run.
Currently trying Earth Balance because I saw it for the first time the other night. Prior to that: Co-op brand (yuck, nasty), Fleishman's Light (even worse, like margarine made of water and chemicals), some other weird brand that I forget the name of (truly awful). Earth Balance is the closest to my beloved Willow Run that I have found. I wish the sticks were the longer thinner kind, rather than the shorter fatter kind, but that's such a minor issue when I think of how disgusting some of the other choices are.
I haven't tried to bake with Earth Balance yet, but I never had a bit of trouble baking with Willow Run, so I recommend it if you can find it.