My experience was quite pleasant, though I have only requested for technical support once in my almost 2 years with Digi fibre. I am able to get technician to fix the line within 2 days, and the Digi tech guy even called me to choose appointment date and time. According to him, appointment slots have to follow the slots from TM, as both personnel need to be at my house to troubleshoot.
My contract will end this November. So far the experience is almost similar than when I use Unifi. The only small cons I found is that, if using Unifi 100mbps, your speedtest probably show like 102mbps, but on Digi fibre 100mbps, you get like 99mbps or ngam ngam 100mbps.Somehow my upload almost above 50mbps.