Got the usually 199 green laser version for 115 like new on ebay ! Got it in yesterday and got it installed , works great and seems like its really going to dynamically change dry fire training drills for good. I highly recommend it . Get on youtube and next level training and other users have some great vids on it in addition to the SIRT pistols. Great product !

2nd this product.

I have the red laser version, does fine for my intended purpose.
Great when trying various drills (when done creatively) in a dry fire condition.
Just keep it real that those follow-up shots "are not" a representation of actual live fire follow up shots, due to lack of recoil.

wives will hate when garage or basements are turned into shooting range I would imagine.  Mine likes it because she can pew-pew safely.

Interesting. I've been considering one for a while. Might have to take the plunge.

Is there a reason to choose green over red if I'll only be using it indoors?

red is cheaper due to I believe the range and easier to see during daylight.
my purpose is mostly indoors.

my only bad experience is with CS (customer service), I had issue lining up the laser to my RDS.
my RDS IS zeroed at 25 yards, and tested during carbine class.  when I try to line up the laser to the RDS, I cannot find a happy compromise.  so I sent it in.
instead of sending a new one, they send the same laser back, and a page of instruction.
that's my only gripe with CS.

IMHO get a used red laser.

ymmv