My parents and MIL have never come out and said they disagree with the way I parent... but there have been enough subtle comments along the way for me to know that it's certainly not the way they would have done things.
I remember my mum saying to me when DS was only small that she thought breastfeeding beyond 12 months was a bit 'weird' - but now that I'm still breastfeeding at over 13 months, she hasn't said a word. So, either she's biting her tongue or she doesn't think it's so weird anymore.
Baby led solids is another area where my parents and MIL seem uncomfortable. My dad is always trying to spoon feed DS (even ridiculous things, like bits of muffin!), and my MIL seems horrified about all the food DS drops on the floor, telling me "You really should train that son of yours not to drop food on the floor"... yeah, because my son is a dog that needs training??? .
And just in general, my parents and MIL have made plenty of comments along the lines of... being too gentle = kids running a muck and ending up in jail.

But for the most part my parents and MIL keep their mouths shut - not sure if this is a good thing or a bad thing. Sometimes I wonder what they're really thinking...