''He does keep things simple and plays a similar way every time he goes out to bat.''
De Grandhomme is part of a No 6-7-8 axis which is becoming more important in test cricket.
You look at England with their Ben Stokes (before his suspension), Jonny Bairstow and Moeen Ali triumvirate; or India with their 7-8-9 threesome of Ravi Ashwin (test average 31.55), Wriddiman Saha (31.8) and Ravi Jadeja (29.17). It is having an increasingly significant part in a test innings.
Mitchell Santner and, either, BJ Watling or the new keeper Tom Blundell, and de Grandhomme is shaping as New Zealand's equivalent.
''We've seen a number of contributions from Colin in that role, always in a positive fashion, whether it be 30, 40s or 50s,'' Williamson added. ''The challenge for any batter is to go on and make a big contribution.''
Certainly when de Grandhomme came out in New Zealand's innings, with the score at 272 for five; he departed at 429 for seven, having squashed any West Indies hopes of nipping through the middle-lower order, scoring 105 of 157 while he was at the crease.
He's averaging 34.55 with the bat from his seven tests and another couple of wickets at the Basin took him to 18 at a tidy 25.66.
It looks like the 31-year-old has a busy summer ahead, with a pile of short form internationals, plus three more tests against the West Indies and England at the end of the summer. A far cry from how his cricket future must have looked two years ago.
He'd had a taste of the international short form game in 2012 followed by four barren years. Now this. Funny old game.