I’ve chosen not to buy an E2 — its “moonlight” mode is 8 lumens, which is higher than I like in a moonlight mode.

Pros:

• One-touch access to moonlight mode
• Instant access to last mode used, which I like to keep on Turbo
• Good runtime and output performance
• Good beam profile
• The cell is USB-rechargeable
• I’m very fond of the Klarus button+paddle interface
• Incredibly small form factor for its performance

Cons:

• The cell is not a standard 18650 — it’s the same size but proprietary to Klarus, real 18650s won’t work in this light, and the proprietary cell won’t work in anything but a Klarus E-series light
• A bit more prone to pocket activation than I would expect
• Lousy holster/pouch options

I carry it, on average, more than any other fliashlight in my collection.