I have just installed MERE ROM from below link. Earlier I had installed Xperia Z2 ROM. Here are my views on this.
1. The phone is very smooth compared to Xperia Z2. No lag at all.
2. Still waiting for OTA updates.
3. Battery is good (tried only for 1 day. Will provide more updates after few days)
4. The UI look and feel is same as stock ROM. However after I have installed Next Launcher it was good.
5. Was expecting Xplode and Gravity Box with the ROM.
I thank all the devs for their hardwork in developing this ROM. it works without lag.
Will post few more updates in next coming days.