It's remarkable the difference a year can make, and the turnaround in fortunes for the Pro12 in the Champions Cup, writes David Wallace.
Out of the five pools, Munster, Leinster and Connacht are top of their tables, with Saracens and Clermont the other two teams who top their groups.
Munster's journey has been remarkable, having failed to compete in a quarter-final since they beat Toulouse in 2013-'14.
They finished third for two years in a row in the pool stages and now they are the dominant side in Pool 1, ahead of their final game against Racing 92.
Connacht have had a sensational couple of seasons too, and after winning the Pro12 title, they backed that form up against Wasps and Toulouse in Pool 2.
Leinster are on 21 points in their pool and they are also set to get a home quarter-final before they play Castres this weekend.
In 2015-'16, the Pro12 teams were on the back-foot because they lacked depth with players playing in the World Cup.
There was a much talked-about hangover for the Irish players after the World Cup, and the provinces suffered in European competition.
Now after plenty of scare-mongering stories, the teams have rode out that wave and they look ready to make a big impact in the latter stages of the Champions Cup.