In reply to damowilk and wbo:
Here the opposite for the Zen. The old Guide Tennies and as well as the Camp4 were great. The new one’s are “different”. On UK Climbing they said Scarpa Zen as an good alternative for the 5.10 and as well as the Arcteryx Acrux. In the beginning the Scarpa Zens felt sort of okay. For a mile okay, but after that I had to get home bare
footed. The Acrux’s were once used to go to the Opera, very painful experience.
Now it is La Sportiva TX4 (soft so no edging, but they fit me). As an alternative for the Camp4 I use La Sportiva Boulder X.