My wife and her mother recently went there.

They both love shopping, but after 2 days, they got tired of it. There's nothing much else to do. Bandung is on the highlands yes, but the ONLY thing noteworthy is the factory outlets.

There is also Tangkuban Perahu, which is an active volcano.

Her verdict was unless you want to spend 5 days shopping 8 hours a day, there's nothing much to do in Bandung.