[azernik]

I've had this setup for a couple of years. Back when I started out on it, with a Dell XPS 15 (9550) and Dell docks, reliability was pretty iffy; unusable for their TB dock and kind of flaky for their USB-C dock. The latter is the only one that has proven in the long run to be a decent implementation; when I switched to a Thinkpad (P52s) a year ago the USB-C dock ended up working just fine, and the TB dock was recalled and replaced and now is just flaky.

I'd either go with a hardware combination that you or a trusted reviewer has tested, or wait another year or so for the bugs to get worked out.

EDIT: Or just avoid Dell, they seem to be behind the curve on figuring out Thunderbolt 3.

[fyfy18]

Even well reviewed devices aren't guaranteed to work. At work I had a TB3 dock from Belkin, that was one of the top sellers on Amazon. Everything worked on the MBP, but when I tried connecting my ThinkPad (T470s) all the peripherals and displays worked, however it wouldn't deliver any power. On the other hand the cheap Chinese TB3 dock (UGREEN branded) I have at home works fine with the ThinkPad.