Both the air and water filter are pretty easily accessible in our fridge. I think it's a Samsung. I don't know the recommended amount of time to change them, but it claims to be "smart" and it tells us when to change them. It's only claimed it needed its filters changed once in owning it about 3 years now. I bought a 3-pack of each, so two of each are just sitting in the box collecting dust. Don't know when I'll ever use them.
The two biggest problems we have with the fridge are:
1) it's design makes it not-ideal for the space it sits in. I tried to argue my wife out of that model for that very reason, but guess who was adamant and who decided to let it go. Consequently the situation is exactly what I said it would be and the left door won't open correctly and it annoys the hell out of me. Amazingly, she doesn't care at all. She wanted that model and it doesn't seem to phase her that one door is half useless.
2) the pest control guys had to install a bath-trap in the wall by the fridge because the other side of that wall is where the guest bath is. Every time they come to spray I have to move the fridge completely out so they can get to it and then put it back in. I don't think it would be so bad if the kitchen floor were flat, but the tile is textured, so items with rollers such as the fridge don't just go where you want them to without a lot more force and finagling.