He isn't the best. Was behind Nicky Robinson and the young Dai Flannagan this year for the Cardiff Blues, but played often due to injuries to both. I'm not a fan at all, he's a confidence player which lacks confidence, so usually makes a few game loosing blunders. He's better off at full-back imo, due to less pressure, he can fall apart under intense pressure sometimes.
Overall, glad the Blues got rid, he's not up to scratch (though replacing him with Sweeney is mind boggling), so nothing to get excited over Col.