Bought in 2001 with 85K miles, now around 160K miles, great look with the white SSE with gold rims, the coolest features from any car out there, heads up display (shines speed on windshield), rear shock leveling system, air compressor in trunk to fill up tires with, good stereo system with factor gain control, electronic compass, tons of gauges, 9 way power adjustable seats, sunroof, this car has it all, and dependable 3.8 liter that is fast and handles very well if put good tires, 30 mpg highway, about 20 mpg in town. Very satisfied owner, there are some electronic problems now developing so gauges don't always work but still drives fine.
All the cool electronic gizmos, roominess yet fast and good handling, nice look with the SSE with fog lamps, gold rims, body molding, spoiler, and sunroof. Also, stereo system is good and 9-way power leather seats...what more can you ask for?
Update the plastic intake manifold (can crack and cause car to idle at very high RPM), alternator life is low due to all the electronics. Unfortunately not only has the Bonneville been discontinued, but so has Pontiac.