I had one and the optics were SHARP ! very sharp ! and the detail seen on Jupiter at about 200x was amazing for a 150mm refractor working at f5 .
CA ( chromatic aberration ) ,,, hell yes , some but not as bad as you would expect , I seem to be quite immune'd to CA , some people cant stand it but the optics in mine were very smooth had very well controlled SA ( spherical aberration ) and the coatings were awesome , I liked it a lot and only sold it because a 5 inch APO came up for sale .
AP ? ( astro photography ) Mono would probably be ok but the CA would make stars bloat quite bad so is AP is going to be your main thing , there are better scopes to be had .
Brian.