Yes, a mirror objective is not for the AF and image stabilization-drenched Grobmotoriker, the sharp images without a tripod brings about. Who however has the necessary strength to keep the camera stable even without cushions and on a reasonably trained fine motor skills, which should be able to produce sharp images even with a mirror telephoto.
The advantage of this lens is its brevity and its low weight. This makes it ideal to carry around even over long distances or in order to stalk through the undergrowth.
What you need, however, is a decent lens hood, otherwise in more light, the images are quickly dull and flat.
The Bokeh a mirror Teles have to learn to deal, that's correct. But this is mainly a matter of the background and forces you to just put a little more in order to deal.
