Last time in Mac, my group went to Yogyakarta-Bandung-Jakarta by train. Worst experience when the executive coach from Yogyakarta to Bandung was fully booked and had to endure the low quality of coach-no aircond, people smoke
But pleasant experience taking executive coach from Bandung to Jakarta, fully aircond, refeshment cake and mineral water.
Tips- go to Jakarta on Saturday and Sunday only if you want to avoid heavy traffic jam. Jakarta traffic jam so bad unless taking bus.

It was nice and cozy in Bandung.
For a cheaper rate of public transportation, try Angkot..just like a minivan. But the driver charge more for outsiders than locals, but still cheaper than taxi.
Hotel got few cheaper, moderate and premium. First time in Bandung, just some small motel and charge only RM40.00 per night. No aircond and fan but there are only a ventilation fan. But very clean.
Second time we opt for a moderate Hotel Royal Dago. Good hotel since it is located along the Dago Street which had several FO - Fashion Outlet. Very easy just to stroll along the street and checkout the merchandise.
The biggest FO like Rumah Mode is a must.
Apart from that volcano lake -Tangkuban Prahu and Kawah Putih at Ciwidey. Beautiful scenery.
Food, there are some clean mall like Ciwalk- Baso Malang, Pak Chi Met, Gampoeng Acheh..crab mee-very delicious.

But on weekend Saturday and Sunday, many people from Jakarta came to Bandung. Better spend some days on weekday and went to Jakarta on weekend because the street will not be overcrowded on Saturday and Sunday.