Over the last month or so my opinion has really changed! Not only do they leak like mad when placed upside down (leading me to bar them from my vehicle), but one of the nipples now has broken apart. I guess you can buy replacement nipples, but I will not be making that investment. Overall they did make the transition easier, but I will not be buying any more of these cups!
I know that Nuby makes other models and I am interested to see what other moms think of these cups and their kin. Also, if anyone is willing to buy the spout replacements I have three cups that you can have!