I've only been there once, on a Saturday day trip for which time was at a premium. Linate was great for that - only about 15-20 minutes by cab right into the centre of the city.

I can't remember anything about the lounge, even assuming that I had enough time to visit it on the way back. I do, however, remember that the duty free shop was quite prepared to sell me Bombay Sapphire on an intra-EU basis (ie buy as much as you like). For the equivalent of £8 per litre bottle, that made for a lot of clanking in the overhead compartment on the way home. (It was a good thing that a day trip doesn't need any cabin baggage at all, just an umbrella and a camera.)