Several months of GX25A3 ownership later and this light is still one of the best LED light purchases I have ever made.
Thanks for the comments - I agree, it's a great little light (but you do have to keep up on thread/contact surface cleaning). Personally, I've always found the Eagletac interface intuitive and easy to use.I have this little guy also. Same set-up and it's big brother (SX25L3_MT-G2). These are fantastic lights. A little high on maitenance though, I clean with alcohol and lube/treat with Deoxit-Red.