I want to third this, this last week I've been integrating payments and I'll soon be adding in Connect as well. It took me quite a bit of back and forth on whether to use Checkout or Elements and I then ended up with 2 different recipes which resulted in the same thing but both highlighted different "important information".

Eventually I just picked one and it seemd to work out really well though. I've also recently been working with the slack docs and they're the total extreme, 8 different guides with similar names and various different deprecation notices around.

On the upside I felt like having both recipes was really useful to get a good overview of the options and possibilities. I'm really happy with my implementation now and I don't think slotting in Connect should be too tricky. Using the stipe docs was a breath of freshair compared to the Slack api docs which I've been using recently and have been an abysmal experience filled with hundreds of open browser tabs.