Bought these when I was weaning my first child (now age 2 1/2) and found them very helpful, but wasn't sure how long they'd last as the plastic felt quite thin - more so than I'd expected. A few broke when they fell out of the freezer (ooops!) and I didn't hold out much hope of them surviving the weaning process. But, apart from the few that broke when they hit the kitchen floor, they all survived. Now weaning my 2nd child and these have proven just as useful as they did the 1st time round. The various sizes make them ideal for freezing/storing different foods, are great for taking home-made food with you when going out, and the lids stay on really well so I've no concerns of them falling open in my bag.
The shape could be better as the oval shape means there's wasted space in between them in the freezer, and I need every millimetre of space in the freezer at the moment! But, that's the only thing I'd change about them. The grooves round the edge of the lids are a bit awkward to clean mushed food out of, but it's a small price to pay to be sure the lids will stay on the pots.
I recommended these to a friend when I first bought them, she used them when weaning her 2 kids and has now passed them on to another friend... they really do last well!