it is a very important benefit.
I am not an expert on this regard.
The follows i shared with you were what I learned from some friends who retired before age of 60.
The reasons are:
1) you start to receive health insurance coverage from medicare and medicad only after you are 65 or older (please confirm the details);
2) if you retire at age 55 and without such benefit, you may have a 10 years of gap without health insurance coverage. Or you need buy the health insurace yourself, which could be quite an expensive cost.
Thus, it is a quite good benefit.
Nowadays, not many company offer such benefit package.
The key you need pay attention is: what are the details of the package?
is it 100% or x %?