I discovered Viridian very early in their production. Long before they came out with their ECR capability. Even though I have used the same C5L for years it has never given me any problem or even a trip back to the factory. I have one tacloc (non ECR holster) for a Walther P99 and C5L combo that I bought about a year after I got the laser. I bought the holster since there were not many companies making laser compatible holsters at the time, and I am not a fan of OWB holsters. So my experience with their in house holsters is limited. I carry my Viridian equipped weapons in a White Hat holster, as they make cuts in the kydex for the popular models from Viridian, CT, and some Surefire.
Personally I do not like the ECR capability they came out with. When they did invent it, Viridian sent me an email offering to upgrade my C5L to be ECR compatible. I responded politely and let them know I prefer to control when my laser is on.
Viridian has gotten some frack for their lasers draining the battery even when the unit is off. Most electronics do draw power when they are off (computers, TV etc) but few companies will tell you. They way I look at it, firearms need maintenance and anything attached to them need it as well. People rely on smoke detectors to save their life in the event of a fire, and check those batteries often. It makes no sense to me that they would not check the batteries on a weapon light or laser, as I have seen complained about in reviews. Another way to offset the battery drain is to use rechargeable batteries. I found a CR2/CR123 battery charger on Amazon for about as much as a 3 pack of CR2 batteries. I change out the batteries in my EDC flashlight (CR123) and my Viridian (CR2) every other week just to keep them fresh.
