Product review (5 stars): Have to push in harder to lock, but works great!
This is almost half the price of the Samsung brand filter.  I was a little concerned about it working properly, but one week in and no leaks or other problems.  I did have to push it in a little harder than the Samsung filter in order to get it to lock into place without leaking.  But, I was able to do it and did not feel I was damaging my fridge by doing so.