If you have sky+ already you could get a freesat telly to get the freesat HD telly and use one of your cables to get the feesat. I didn’t like the fact that sky wouldn’t give you the free HD channels.
HD is good, especially on wildlife / big landscape programs.
Makes you realise how ‘dirty’ normal transmissions are, although there are rumours that they deliberately de-grading the normal channels.
We weren’t making use of the Sky package so went freesat and bought a Humax box. Apart from a couple of bugs with the Humax box (which you learn to live with) I’ve no regrets.
Perhaps not worth paying £10 a month extra unless you get some decent channels, BBC being one of them.
If you like football its definitely worth it.
Not worth it on anything much smaller than 32″ IMO