The SP01 is massive, and heavy. I pity the man who carries it.
You always read people describing the SP-01 like this, but rarely the full size steel 1911 that is VERY similar in weight and dimensions...
With thin VZ grips, the SP-01 is pretty slim for a double stack auto, and with a flush 16rd mag it conceals as well as any other full size gun in a purpose made holster and gun belt.