If you have (very) positive experience at arrival lounge, would you please share? Also would be useful to know who can get into lounge.

My personal experience is that arrival lounges are quite few comparing those to airside and in general are lower qualify. Also, instead of airline lounges, they are owned/managed by third party providers - Priority Pass, SATS, etc.
Said all above, I think the best experience at arrival lounge I had at ZRH. Also, I think the only place (correct me if I am wrong) where one can get access to the lounge by being Star Alliance Gold, instead of flying on C/F.