I think the manual safety argument can go either way. It all comes down to training. Trigger finger discipline is one of the most important (and perhaps most lacking) safety considerations. With good training and habits, the glock is perfectly safe. Some feel more comfortable with the manual safety on the beretta. But at the end of the day, if the shooter is not religious about engaging the safety, it's nothing but a false sense of security. On the Beretta, the safety is also the decocker, so it's more likely to be utilized (at the range, at least).
As for speed, I find the beretta safety to be an annoyance. A 1911 safety can be disengaged on the way into shooting position, and provided the shooter is used to the platform, it adds negligible time to the firing process. The beretta safety is (for me - YMMV) in an annoying place, and does take significant time and motor skills to disengage. However, DA/SA pistols are generally carried chambered, hammer down, with the safety OFF - meaning the extra time is not an issue; that also means that the safety doesn't provide any additional safety. If the trigger is pulled, the gun is going to fire -- just like the Glock.
Thankfully, I have never had any interaction with customer service of either company. That being said, I have heard, second-hand, several negative stories about Beretta's service. I have never heard of a negative experience with Glock CS. In fact...I have never personally heard of anyone having to use Glock CS.
As for speed, I find the beretta safety to be an annoyance. A 1911 safety can be disengaged on the way into shooting position, and provided the shooter is used to the platform, it adds negligible time to the firing process. The beretta safety is (for me - YMMV) in an annoying place, and does take significant time and motor skills to disengage. However, DA/SA pistols are generally carried chambered, hammer down, with the safety OFF - meaning the extra time is not an issue; that also means that the safety doesn't provide any additional safety. If the trigger is pulled, the gun is going to fire -- just like the Glock.
Thankfully, I have never had any interaction with customer service of either company. That being said, I have heard, second-hand, several negative stories about Beretta's service. I have never heard of a negative experience with Glock CS. In fact...I have never personally heard of anyone having to use Glock CS.