These socks are very cute and I was glad to receive a few pairs of the "Rosies" as hand-me-downs. They stay on pretty well too, but are certainly not "kick proof."
Overall, however, my opinion of the whole Trumpette "shoe look-alike" line has lessened somewhat the longer I've owned them. First, as a reviewer has already noted, the design on the socks should really be improved so that the "shoe" comes up higher in the back to compensate for the inevitable slipping of the sock. When the sock slips, (and it will slip regardless of how well it fits, but even more so when it is slightly too tight or slightly too large, which is most of the sock's life on the baby!), the design isn't as nice, since it looks like the "shoe" is coming off. I find myself constantly tugging on my daughter's socks to pull up the "shoe" part. Now, the only reason I bother tugging at all with so many better things to do with my time is because these socks are just so darn cute and I love to see that little "shoe" on her. But, really, Trumpette and the companies that make similar socks should take note of this for future models.
The next issue I have is the size. As a few others have pointed out, these socks are most definitely NOT 0-12 months. I would say they would be best advertised as 0-6 months, but they would probably more realistically fit a 2-7 month old. My daughter is somewhat on the small side (25th percentile in height and weight at 3 months, 25th percentile in weight and 50th percentile in height at 6.5 months, if that gives you any indication) and the socks fit her fine at 2 months when we first got them. Now at 7 months, they are pretty tight and the shoe design slips down quite easily. I would say if your baby is 6 months old already or is large, I would skip the 0-12 months size and go straight for the 1-2 year size, which unfortunately doesn't seem to be available in all the styles/colors. I just bought the 1-2 year size and they fit my girl pretty well now at 7 months; they're just a tad too large, but they stay on fine and look fine too.
Another option is to get another brand that makes similar "shoe socks." I personally think Mudpie's versions are even cuter than Trumpette's (added decorations like patterns on the socks and rhinestones on the "shoe") and they run slightly larger than the Trumpette 0-12 months, despite their advertised size of 0-6 months. (They are not as large as the Trumpette 1-2 yrs, though.) I love my daughter's Mudpies and I don't see the brand nearly as often as Trumpettes on other babies' feet. Dolly and Dimples is another brand to try - They are supposedly 0-9 months and have some very cute variations of the "sock shoe." For a cheaper version (and less variety of styles/colors), The Children's Place has a Mary Jane "shoe sock."
The last complaint I have is that Trumpettes don't seem to be available to purchase in quantities less than 6. I would have liked to try a combination of the various styles and colors, buying them singly or in pairs. But, at 24 dollars per pack of six in the stores and online, I won't do it. A few of the other brands let you buy one or three pairs, making them cheaper options if you want to mix and match or really just want one pair.
Trumpettes have a great idea, and they seem quite popular with mothers of daughters in particular, but they could definitely be improved, and they aren't the only ones on the market either.