The more you play it the more you will find the bugs. Its not as bad as at the beginning it has been patched a few times. Typical encounters - Zombies walking in the air, blowing zombies up leaving limbs in the air, zombies stuck in walls, fences, doors etc. Accidentally blow yourself up and get stuck in mid air etc.
Loved the first one and pretty much completed it beyond the story and all the DLC. Some of the mods were good too, improved AI for defending base, Walking Dead Characters as fellow survivors, change the stats/build for your base etc etc.
Thats why I was so disappointed with the sequel so much worse than the first one.