Yes, it's excellent. I've used it on a A7R2 and least one Sony lens.
Efinity is cheaper and I used their warranty twice. Spent over 30k there saving myself a good 20k+. My second claim they didn't even ask for my lens back to check my claim, they just sent me the focus rubber ring I needed. (I got the option to send back and wait a few weeks for it to be fixed/replaced or to just order for me what I needed, I took on that) Top service and the savings from buying 2 or 3 lenses gives you money to spare to just buy a replacement (spare) lens outright.
Both substantially cheaper on efinity with warranty too. But HotUKDeals will not allow me to post here as they don't get any referral £s from them
Have you ever used their warranty? Or is it just useless piece of paper with no backing?
Then you don't understand th value of this body and how the kit lens wouldn't allow you to fulfil this cameras potential anyway