Rienz: you are quite correct in the IQ and responsiveness comments. But, I would argue that the use the OP is suggesting for their setup, lends itself very well for the SX50. Usually daylight photos, not often fast moving objects, and I would like the possibility to get a close-up at the top of the rollercoaster, just before the first drop, all while standing on the ground.
For fun family and vacation pictures in daylight, the SX50 is more than capable of delivering nice pics, and you never have to switch lenses, and as I mentioned, it weighs less than the lens, making it easy to handle for kids and the like, when the OP wants a pic of themselves in the rollercoaster...
I totally agree with your logic about the convenience of SX50
But the OP's question was "Anyone have any experience/sample images with this lens?" ... if I am not wrong I don't think he is looking for a super zoom point and shoot camera.
5D MK III, 16-35/2.8 L II, 24-70/2.8 VC, 24-105/4 L IS, 70-200/2.8 L IS II, 100/2.8 L IS, 40/2.8, 50/1.4, 85/1.8, 150-500 OS, 600EX-RTx2, ST-E3-RT, Rokinon 24/3.5 T-S, D7100+18-300 VR, YN568EX, 055CXPRO4+468MGRC2, 190CXPRO4+322RC2, Gorillapod Focus+496RC2, CamRanger, B+W filters, Konova K3/31.5 etc