Like contemporary Christian sacred art, let's say from the 1950s to now? Like early 18th century architecture and frescoes, or just nosey, and want to see how the rich and aristocratic lived in that day? You're in luck, but it will take a minimum of effort since it's a bit out of the way. Easy to get to, though, but more about the practicalities, later.
(Impatient type? skip to the bottom for the practicalities!)
Admittedly, the museum is a bit old and dusty in its layout, but real museum and art fans won't let that bother them. It also was as hot as Hades the day I went, and the lack of summertime AC means that there are a lot of enormous jumps in temps and humidity levels that are dangerous for the building's decor and many of the more delicate art pieces. It was my first time there, so I can't say if it is heated in the winter, but I can say that -- as is typical of, I'd wager, most Italian public places, including museums -- it isn't handicapped accessible. No bar, not even a vending machine (though they might be considering such, given the items on the questionnaire), but the bathrooms are clean, and it's pretty easy to get to, though it does take a gouge out of your day.
So, is it worth it to go? Yes, if you are interested in 18th century villas and/or modern and contemporary art, sacred or not.
If you live in, or near, the area, they apparently have a lively music and conference program throughout the year, too.
VILLA CLERICI - GASC / GALLERIA DI ARTE SACRA CONTEMPORANEA
Via Terrugia 8/14
02.647.0066 / 02.6611.8036
Hours: Monday - Saturday from 2:30 to 18:30 PM, no reservations required
Entry fee: E 2.50
HOW TO GET THERE
Get yourself to the via Terruggia stop in "downtown Niguarda" (Niguarda being a peripheral area absorbed by the expansion of Milan, it still has quite a provincial small town feel to it, despite the large and famous "Novecento" style hospital.) From downtown, it might take about 45 minutes.
To do this, you can take the MM3 / yellow line to Macciachini, then the n.4 tram to NIGUARDA CENTRO (NOT Niguarda Ospedale), get off, and walk in the same direction you just came for about three streets, then turn left onto Terruggia.
You can also take the MM5 / lilac line to Ca'Granda (another name for the hospital, which substituted the Renaissance hospital of that same name, whose buildings now serve as the main seat for the State University of Milan), where you need to take the bus n. 42, and get off at the via Terruggia stop.
Alternatively, you can take the MM5 / lilac line to Bicocca, then take the 52 bus to the stop via Terruggia / via Val di Ledro.