Hi, first time poster. I myself had the One Plan and did utilise the unlimited tethering. I watch a lot of Netflix during commute as I travel up to an hour each way every work day. I would have used my tablet too, etc.
Anyway, since I live in rural area with REALLY bad Internet speeds, I would have supplemented the broadband with the One Plan's unlimited tethering. I'm now on that £25pm contract, with 600mins, unlimited data etc. For me, it's an extra £6pm for less services that I truly need i.e. data usage, now that my unlimited tethering is reduced to 12GB limit. Speaking to 3UK's god awful Customer Service team was a waste of time, it's like speaking to a wall.
Hate to think what products will be like if O2 merger is agreed. Though one good thing is I live in NI, so 3UK have the special trial deal of Home Mobile broadband - 40GB for £20pm on a 12mth contract. I hope they don't discontinue it anytime soon!
So to recap, in the past, paying £19pm gave me everything, now I have to pay £45pm - 1x£25 sim only contract and 1x£20 Home Mobile Broadband.