Ruger puts locks on all of their revolvers now, S&W does NOT.
Really? When did this happen? I have two fairly recently manufactured Rugers, a GP100 and an SP101 and neither has an internal lock.
IMO a lot of factors play into dissatisfaction with the lock.
1. It was poorly designed and implemented if for no other reason than it mars the appearance of otherwise classic firearms. S&W is in the same discussion with Colt and Winchester as iconic American firearms. We like to shoot them, but we also like to take them out and admire the craftsmanship...tougher to do with that hole staring you in the face.
I don't feel the same way about a Glock, or a Kahr, or any number of fine firearms.
This is probably why I find the locks especially egregious on S&W's "Classic" line.
2. It represents an appeasement to those who would impose Euro style restrictions on us if they could.
3. It's an answer to a non-existent problem. I have a gun safe and a bag full of trigger locks. Why do I need an ILS especially when....
4. There is potential for failure, however rare. Now, failures happen on guns without locks, but the ILS is unnecessary to the function of the gun.
I own a HK USP Compact. It's the only firearm I own with an internal lock. I would prefer it not be there, but at least it is discrete...out of sight, out of mind.
I only own one S&W, a model 64....without a lock. I just recently purchased it, and I like it alot. It's very accurate and looks great. I'm already thinking about purchasing another S&W, probably a 686...but I'll be looking to the used market again.