@GoGoLego very easy to put up but I do separate the layers, I used an old bed sheet cut into 20cm wide strips and then the children hold up a layer of branches and me and Dh tie the strip around it. It just helps when you go to release a layer for fluffing the following year and I put the lights on each layer
It is a lovely family activity, I have 2 sons 16 and 13 who are very willing helpers. Mine comes in 3 sections so not too heavy to manhandle it together.
I would say it was relatively painless, but then I have trained my sons well
they are in charge of a set of baubles, so my tree decorations are white, silver and clear. When they come out of storage boxes they are separated by colour on the floor, each person has 1 colour that they put on the tree and they do either a diamond shape, (top, middle at each side, and bottom in line with the top one) triangle (top, middle at each side) or inverted triangle with one set of bauble design. That way you don't end up with the same baubles next to each other.
You move round the tree in this fashion varying the starting height of bauble placement and it is done super quick. Our tree sits on place mats so as not to damage the carpet with the feet from the stand, we can get to the back of the tree easily and when it is finished, push it backwards into position via the place mats.
This came about as I had flu one year and instructed from the sofa when the children were much smaller. I should point out that Dh is putting up other decorations whilst we do this, he isn't sat with his feet up, he loves Christmas too.