FWIW, I switched to Plusnet 4 days back and so far, the service has been rock solid.
I was with BT for over 4 years on Infinity 2 and the main reason I switched was to save a bit of money. It was going to cost me over £50 a month with their next (imminent) price hike. Was getting tired of being ripped off. Didn't use their WiFi, Cloud Storage, email or any of that nonsense.
Their support forum appears to be quite good; quite a lot of their senior support staff hang about and are quick to jump on issues. This was one of the biggest issues with BT - support was pretty much non-existent. Everything required escalating and a lot of moaning; I was getting quite fed up.
Plus with Plusnet, I get a static IP for free (well, for a £5 setup fee).
Latency- same as BT, no changes there. Around 8-9 ms to Google and other UK based websites on a wired connection (additional 2 ms on wireless).
Speed- ran a single stream iPerf yesterday (over wireless because I was feeling lazy) and hit pretty much the maximum possible on my connection. Should be able to squeeze a tiny bit more on a wired connection.
Up
Connecting to host abc.def.net, port 5201
[ 4] local 192.168.1.94 port 31467 connected to 178.xx.xx.xx port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 2.38 MBytes 19.9 Mbits/sec
[ 4] 1.00-2.01 sec 2.12 MBytes 17.7 Mbits/sec
[ 4] 2.01-3.01 sec 2.25 MBytes 18.8 Mbits/sec
[ 4] 3.01-4.01 sec 2.25 MBytes 18.9 Mbits/sec
[ 4] 4.01-5.01 sec 2.25 MBytes 18.9 Mbits/sec
[ 4] 5.01-6.01 sec 2.25 MBytes 18.8 Mbits/sec
[ 4] 6.01-7.01 sec 2.25 MBytes 18.9 Mbits/sec
[ 4] 7.01-8.00 sec 2.25 MBytes 19.1 Mbits/sec
[ 4] 8.00-9.00 sec 2.12 MBytes 17.9 Mbits/sec
[ 4] 9.00-10.00 sec 2.25 MBytes 18.9 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 22.4 MBytes 18.8 Mbits/sec sender
[ 4] 0.00-10.00 sec 22.4 MBytes 18.8 Mbits/sec receiver
Down
Connecting to host abc.def.net, port 5201
Reverse mode, remote host abc.def.net is sending
[ 4] local 192.168.1.94 port 31474 connected to 178.xx.xx.xx port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 9.00 MBytes 75.5 Mbits/sec
[ 4] 1.00-2.00 sec 8.92 MBytes 74.9 Mbits/sec
[ 4] 2.00-3.00 sec 8.92 MBytes 74.9 Mbits/sec
[ 4] 3.00-4.00 sec 8.93 MBytes 74.9 Mbits/sec
[ 4] 4.00-5.00 sec 8.93 MBytes 74.9 Mbits/sec
[ 4] 5.00-6.00 sec 8.75 MBytes 73.4 Mbits/sec
[ 4] 6.00-7.00 sec 8.93 MBytes 74.9 Mbits/sec
[ 4] 7.00-8.00 sec 8.74 MBytes 73.3 Mbits/sec
[ 4] 8.00-9.00 sec 8.79 MBytes 73.7 Mbits/sec
[ 4] 9.00-10.00 sec 8.79 MBytes 73.7 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 90.0 MBytes 75.5 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 89.1 MBytes 74.7 Mbits/sec receiver
Hub One Router - no idea how good it is. Lying unopened as I'm still using my HH5B. It's a rebadged HH5A so doesn't have a Broadcom chipset. YMMV.