The ZenFone 2 was one of the best budget phones to launch last summer, and the Laser variant (named after a laser auto-focus module) was a good follow-up. Now the latter (ZE500KL model) is getting its Android 6.0 update, WW_188.8.131.52_M3.6.44.
That's a big deal. Cheaper handsets weren't this good a few years back, and they generally didn't receive much support. Times have changed.
But what some owners may consider a bigger deal is the sheer amount of bloatware that won't come pre-loaded following the update. Over twenty apps make the list.
Google settings (Integrated in ASUS Settings)
That's not to say owners are completely out of the woods. This over-the-air update does add Google Calendar, Google Messenger, and Dr. Booster. One of these is not like the others.
Asus suggests that you move all apps to internal storage before updating, as Marshmallow won't support APP2SD. See the link below for more details. And if you own a different ZenFone device, your turn may be coming up.
You can download the full 1.42GB ZE500KL (Z00E/Z00ED/Z00EDA/Z00EDB: V184.108.40.206 for WW SKU only) update here.
[ZenFone 2] [ZenFone 2 Laser]  ZE550KL_WW_V21.40.1220.1615 (Android M)
ZenFone Laser (ZE550KL)
(It takes about one week for the system to complete the autopush, if you did not receive the updation, please go to 【Setting】->【About】->【System Update】to update manaully)
Software update to Android 6.0 Mashmallow. Internal storage will decrease slightly after update, suggest to back up data and relocate media file (pictures & video clip) to SD card to reserve enough storage before starting the software update.
Android Marshmallow won't support APP2SD. Please move apps to internal storage before system upgrades.
Multi-user function won't be supported if the account is deleted. Please keep your account to continue usage.