I just tried it quickly. I removed it quite instantly :
- Ugly interface : on my system, the squares that represent groups of clusters are surrounded by a "way to wide" black outline, which has an absolute thickness, so when squares are reduced, the black is everywhere. I guess it depends on your local windows settings though
- After a complete optimization, zone mode was activated, I used my PC to make just a few changes, then restarted a complete optimization, it took almost as much time as the first optim. So re-defragmentation doesn't take into account it was already optimized.
For this, I much prefer Puran 7.1 Free or even IOBit SmartDefrag 1.5 (not V2, still beta & buggy).