
Crates were not widely used in the UK when we left for N.America. However, as I discovered, there aren't many, if any, benched shows over there (Canada) and everybody seemed to have crates so we joined in and have used them ever since. I found them essential for puppies once we moved and lost our puppy pen (under the stairs in the kitchen). They keep a puppy out of mischief and DANGER, when you can't superview what's going on - who can, 24/7. Mine slept in theirs at night, in my room and did from the day they came to us after we stopped breeding. If youi cover the top and sides, that makes for a little safe den which most puppies appreciate.
You'd probably do well to set one up in the living area where you are during the day, leaving the door open so your puppy should use it as any other dog bed. When you have to do other things, or go out for a short while (note short), after playing with the puppy and taking him out to empty, then take him back to the crate with a few treats, and shut the door (ditto for first thing at night). He may complain at first, but if you have timed it right, he should settle down for a nap.
The down side is to leave a puppy in a crate for way too long - which too many people seem to do. Puppies need to be able to run around during the daytime so their muscles, joints and bone develop as they should. And to keep them mentally challenged.
A crate is good for car travel/hotel rooms and for a patient recovering from surgery or injury.
Choose one that will last into adulthood. I don't believe in using a small one as some do thinking the puppy won't empty in there in a small space - if a puppy is left too long in a crate, he'll simply mess in there, regardless of size. If the crate is big enough and he has a need to 'go', at least in a big one he won't be forced to lie in it. Eww.