The Celtic boss is high on confidence amid his side's recent form.
The Scottish champions are currently top of the Premiership and, on Saturday, beat Dundee to progress to the Scottish Cup quarter-finals.
The achievement added to their fine season so far, in which Celtic have also reached the Scottish League Cup final and progressed to the last 32 of the Europa League.
Only a few weeks ago, though, Celtic's season was not quite the subject of the same praise as Deila acclimatised to life in Scotland.
And the attacking intensity that pleased the Norwegian so much against Dundee was less visible during tougher stages of Celtic's campaign - as Deila admits.
“We have been struggling at times but we’re getting better and better and there’s still much to go," he told reporters.
“However, I had a smile on my face when I drove home from the game against Dundee on Saturday because I liked seeing the intensity in the attack.”
Celtic have been drawn with Dundee United in the next round of the Cup, while a potential classic lies in wait when it comes to Europe, as the Bhoys face Inter Milan later this month.
As for Celtic's attacking intensity, United have scored more goals than them in the Scottish Premiership, although Deila's men do have a game in hand. They also have two games in hand over second-placed Aberdeen, who are level on points with them.