£3 a month is £36 a year. And £72 over two years, £108 over three years. And if/when you leave VM you'll have to hand them back. That's staggeringly poor value.
For about forty quid you can buy a halfway decent Tenda or TP-Link powerline wifi booster kit (prices vary regularly, so I'll hold off making any recommendations), and for £70-100 you could buy a thoroughly capable mesh wireless system that will be vastly superior to the crummy wireless that VM's hub offers. I replaced my Hub's crummy wireless with a TP-Link Deco M4 twin unit mesh system, and they're superb, although as with other kit the price fluctuates regularly - you could consider it at £70-80 for a twin pack, but if priced at £100 then you'd be better off with something like a Tenda Nova MW3 where you can get a three unit mesh system for £70.
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As above, I use TP-Link and have for years. I have a mix of WIFI booster and power plugs but to be honest, I use the power plug (cable) part only. In the master bedroom I have a power plug feeding a WIFI access point to get better coverage (1968 built house, VERY solid walls). I had this setup in my old house over 10 years back to get over the steels between the home Hub and the master bed in the loft conversion
I didn't even know Virgin were doing these plugs until last week.
What I will say is VM tech told me late last week that my WIFI issues were caused by my non-VM kit. As the problems only started last week, I have discounted that "solution" and de-bugged it myself.
Pay for VM powerplugs? I don't think so.
Anyway - their kit is only "Branded" merchandise, in a Virgin box. Even the Hub 3 is branded and made by someone else
Put that money towards something better and something that’s YOURS at the end of it.
***** If you think my answer has helped - please provide me with a Kudos rating and mark as Helpful Answer!! I do not work for Virgin Media - all opinions expressed are of my own and all answers are provided from my own and past experiences. Office 365, Dynamics CRM and Cloud Computing Jedi