Stock light:

1. UI is decent.

2. Regulation is great.

3. Durability is great. Dropped it a lot. Never had a problem.

4. Brightness is good at around 1095 lumens at 30 sec for me.

5. Beam is trash because of the XP-L2.

However, it is super easy to mod.

Just open up the head, plop in an SST-20 4000k and you are good to go.