Anyone that says there is a 1/2 hour delay is overexaggerating to the point of flat out lying. It is maybe 30 seconds. There has been a handful of times in the 4 years I've had my truck that it didn't work, but I always got a notification saying it failed, then redid it and it worked. People just love to complain about all kinds of nonsense these days.
For me, it is worth it because I live in an incredibly hot environment, and I can crank my truck from my office and let it cool down 5-10 minutes before I'm done for the day without having to walk outside. That alone is worth it for me. Plus, there has been several times I have gone out to get something from my truck, or been in my garage and needed something but realized I didn't have my keys on me. Instead of having to go chase down my keys, I can open the truck with my phone in a few seconds. Is it instantaneous like having the key? No, it's not. Has it ever taken anywhere near 30 minutes? Not even close. Whether it is worth it is obviously a personal choice, and to many it is not. To me, it is. Additionally, since I do not have carplay in my 17, it is much easier to find an address on google maps and send it to the truck than it is to fumble around with the head unit trying to find the address.