I have been a customer of Plusnet for around 12mths & have a FTTC 80/20 unlimited service,

There is frequent congestion Low. throughput speeds and high jitter and increased latency from 7.30pm thru till 12 midnight isn't uncommon,
Some of their tech support staff although polite are,not knowledgeable enough and do give out some incorrect information

Their copy IP profile and their traffic prioritisation/management,Don't benefit me in anyway, infact they just hinder, I chose Plusnet For FTTC because it was cheaper than other providers and as i did not know how well a FTTC service would work on my line,

As someone who plays online games, low, stable latency is of significant importance to me,At first latency was quite low to some gaming servers ,
Sadly not any more due to their choice of peering, and plusnot obviously don't care,

The VDSL2 FTTC service it's self which plusnet don't have control of Has worked reasonably well, although for how much longer i don't know (crosstalk levels ect,as the FTTC cab is populated)and of course line faults

Update: Since i wrote above i have left plusnet,the evening peak time congestion issues became more frequent and further impacted performance Since migrating i have found that as a result of their traffic management and use of a secondary IP profile that my throughput had been restricted by around 3mbps not a lot i know, but never the less they throttled my connection
Also since moving the regular peak time issues have gone