Pretty good. Feels way too much like Last Stand 1 & 2.
Only real complaint I have is the searching mechanic. I keep sending out parties that have a low risk of casualties and high chance of survivor and item retrieval, but time and time again they turn up nothing usable and with at least one person lost. By day twenty I have no one left in my party because they aren't finding any new survivors and they all keep dying in spite of the game telling me they'll be fine when I send them out.
Either it's a glitch or I'm just really unlucky.