I'll admit I am a convert. I have been using them on all my rough-ins and loving them!

I get only six and four port. They are literally a few pennies difference in price and cannot justify carrying four different sizes.
I use six post for anything more than a one gang box.

They are also only about 7-8 cents more than a wire nut. I can make up that many times over in time saved.

petey: what brand do you use?

I'm going to use the Ideal for my DIY rough-in. I asked my inspector if he required crimps, etc. and he said any method that's UL approved is OK. The Ideal are UL approved for grounding and bonding, which is all I will use them for.

For the 3-gang boxes I'll probably daisy-chain 4-port connectors together... two ports for incoming and outoing grounds, one port to the switch and another to the next connector... unless someone has a better idea.

I would love to see petey_racer post some pictures of his work :-)

I use Ideal 'cause that's what my guys carry.

Pics? Hmmmm. Maybe I can get some soon.

So you guys use these for hot, neutral and ground wires, correct? Do you tape them up when finished?

"Do you tape them up when finished?"

Why would you make a mess by taping them?

I do not use them for grounds. I use barrel crimps.

ABSOLUTELY DO NOT tape them. That would be more silly than taping a wire nut.
Just make sure your strip lengths are right.