I've just had to get my mouse replaced due to a double clicking issue. I used the bot and it was OK taking about 10 mins to answer it's questions and then another 10mins before I got to chat to a real person. It then took about another 40mins before they finally agreed to send me a replacement.
The length of time was mainly because they asked me to run through a whole host of troubleshooting steps (TBH I didn't bother, I just went and did something else for 15 mins as I knew what the problem was and no amount of troubleshooting was going to help.) but also because the person I was chatting to would take between 2-5 mins to respond to each answer I gave. I put that down to them looking up the right response from their cheat sheet each time as I don't think they were a native English speaker.
All in all I still rate the service as good, I've got a replacement coming and still have the existing mouse as a backup so all's good.