Sala Leonardo Lounge

I agree with Mathias’s review almost 100%. I would never pay to go to this lounge. The service is almost nonexistent. Even if you are a priority member of another SkyTeam airline, and especially of you don’t speak italian you will most likely have a lot of trouble being allowed in the lounge. The service desk like most of Alitalia don’t know nor care to understand rules and services of their partner airlines. So easiest way to enter is to have a business class ticket, speak italian, and be a higher level Alitalia member (MileMiglia).
If these aren’t issues for you then yes it is a nice refuge. Large windows to view the Tarmac and lots of natural light. 2 or 3 TVs normally on quietly and on RAI news. English newspapers are normally FT, International Harold and WSJ. (But if you’re flying business often you can get these newspapers on the plane) Unless it’s peak hours your only choice for food is prepackaged small italian baked items or crackers and cookies. The bathrooms are normally very clean. There’s a tony business center that I’ve never seen anyone use. And yes the wifi is a big headache. (Again the front desk has no clue how to help you) even once you get it working (and it’s improved a lot in the last year) it will sometimes randomly cut out for a few seconds.
But hey, at least you can view the small mini history timeline of the Alitalia fly attendants uniform changes.
You’ll get the best service if you smile, are kind, non assuming or pretentious and look the people in the eyes and say thank you a lot.

This lounge at Linate Airport is a lot like Italy in general. Food is pretty decent to be a lounge (nice croissants with good ham and cheese) but no hot food or anything a bit more healthy. Beverages is your standard selection of some alcohol, sodas and water but as the case most often is in Italy the coffee is terrible. Typical robusta-​based roast that can be forces down with some milk. Service is appalling and in general one should expect disinterested service at best and rude at worst. Instructions for using internet are wrong (and complex) so best bet is to ask a fellow lounge visitor.
Selection of non-​Italian newspapers and magazines is often poor (WSJ) or non-​existent. Still the lounge offers a refuge in an otherwise pretty sad airport (service-​wise that is, location is its key strength) but I would never pay for access but if one has free access (frequent flyer or Priority Pass) it is still worth to enter for a snack.