Your vodaphone deal Sounds like a good way of covering the holiday for you. I suppose it is all down to what you need. The two year life span is what attracts me to the 3 deal as I only use it in a mifi in the van when we are away. My usage is relatively low so a 3 sim does me for nearly a year. We have done 120 nights this year and I only do emails, forums and newspapers.
My phone is 9 years of age and does calls and texts. £20 does me a year! That’s the benefit of having no friends!!
By the way, the sim does qualify for free delivery, but they have hidden the delivery options even more than usual, so anyone wanting to buy one, do have a good hunt round for a small blue 2 word link in the middle of a sentence.