Never been inclined to go for one of these as, regarding technology, I do believe that, in the main, one gets what one pays for. My neighbour, who is an OAP, bought himself a hudl, which his great grandson also uses, and he loves it. He was showing it to me, and I found it to be extremely slow and quite unresponsive. imho, the screen resolution was fine, colours vibrant. After a while of having to swipe it several times, it would start to annoy me, so this is definitely not the gadget for me.
I think that, comparatively, this is not such a bargain buy. It is quad core, which is great, and quite unexpected in a tablet under the Tesco brand. On the down side, the screen is small. Hannspree sell a quad core, 10.1" tablet at the same price, but with a £10 off code, at Asda, bringing the price down to £10 less than the hudl, same specs other than mentioned, but with a 2 year warranty. Less money, better value. Battery life, max 9 hours. Lenovo Yoga 8" is £149.99 at Currys, battery life max 18 hours. A reputable brand, imo the ever important battery life is better.
I would suggest you look around at the comparables, and you will find there are better models out there, than the lowly hudl. The case for it is £15, then earphones are £6.
Having said that, a lot of people love it, but certain specs are more important to some, than others.