I'm using HGC no problem so far.
I was lucky i couldn't get the line connected at the first day (Jun 18) and called the customer service (indeed it's very difficult to catch up with their staff by hotline) they sent a technician at same day to fix the line.
I had another problem with the socket for internet they send another technician to check it out and found that my 裝修師父"答"錯線 while he transfer the plug to another location. The technician helped me to fix it.