Not bad experience per se. I have always enjoyed riding Bajaj vehicles and would anyday prefer touring India on a Discover/Platina than on a Splendor/Passion. But I have seen that the Pulsars and Discovers being owned by my friends literally start to fall apart after a couple of years of ownership while the Karizmas, Splendors, Unicorns, even Apaches owned by some others hold on very well. Almost all my friends are auto enthusiasts and take care of their vehicles, so any cases of bad maintainence are ruled out. Common problems faced by them are loss in engine refinement (DTSi only), rust, peeling of chrome plating, hardening of rubber parts, rotting away of silencers, etc.
I remember reading an interview of the Product Engineer who developed the 200 NS (can't remember his name) and I remember him saying that the Pulsars (and the 200 NS) have been designed to last for approximately four years or so. The interview should still be there on the Zigwheels website.
But then, I have never owned a Bajaj motorcycle. The only Bajaj Product in my family was a Bajaj 150 and I absolutely loved it. 3 gears. 2 stroke. Super tough. Bliss. I wish I still had it.
Maybe Bajaj owners could answer your question better.