Canon 60Da - what is wrong with this camera?

Had some initial thoughts about getting a pair of Canon 60Da cameras (dedicated astro cameras are so cool and fancy and DSLRs are not quite up to the job, I was told). Have not regretted getting the cameras for a second!

The Andormeda galaxy (Canon 60Da, 16x5 min, ISO400, RAW and my lovely Williams Optics 98/500 mm refractor - with the 0,8x reducer + a bit AstroArt and bias, flat and dark frames).

Quite passable - eh?