My connection over the past few months has been generally unusable after 6/7pm and at weekends (both wired and wireless generally have the same performance). I'm struggling to use things like Netflix and browse the Internet simultaneously, which I didn't think would be much of an issue with VIVID 350 Optical Fibre. Speedtest.net shows speeds of 10mb or below at these times.
I am running in Modem mode with a Netgear R8000 Nighthawk X6 AC3200, which broadcasts both 2.4 and 5ghz. As mentioned earlier, wireless performance is about the same as wired - poor.
My area is 01. I've had this connection for a bit over a year now, so I'm out of contract and tempted to switch given the poor service and forthcoming price rise, however I thought it may be worth troubleshooting first before making any major decisions. It was fine for the first few months.