I have Lantac, Kriss Defiance and used smith and wesson, NWCP as well.
Lantac is top of the list in AR platform with built quality and performance, but the customer service is not the greatest, they wont give you any updates as already mentioned by other members.
Kriss Defiance is the second best rifle out there, it gives you option to change 10/22 barrel.
NWCP is ok for the price, but built quality is no way near Lantac,, but Wyane is a gentleman.
Smith and wesson is a budget gun, good and reliable, but not accurate.
All depends what you want to use it for.
There is no gun out there to beat ruger 10/22 though.