This is my second shirt from Historical Emporium, but my first collarless. With it I bought three different collars (in the same size) and some collar studs. Quality-wise the shirt is well made and perfectly satisfactory. Ordering the right size without an actual fitting can be hit or miss, but the shirt fitted very well using the Emporium's guides to measure up.
I didn't need the collar studs. The shirt has a button at back of the collar and comes with a stud at the front. Collar studs aren't visible under neck-wear, either; still, it's nice to have a set to my own taste and small items get lost, so spares are good.
Wearing it - now there's a small learning curve! I hadn't had a detachable-collared shirt since the air force cadets (way back in the '60s) issued us lads mismatched WW2 uniform equipment, and mine never fitted! This shirt and the collar did, both me and each other. But how did grandpa get dressed without the help of a gentleman's gentleman?
I found, after fruitless contortions, the easy way is to attach the collar by the back button, and one end of the collar to the collar stud, but leave the other end free. Pull the shirt on (it only unbuttons part way!) then do up the shirt and attached collar.
Then add your period neck-wear. And a vest/waistcoat. A gentleman never wore his shirt fully exposed.
Finally, wear it in public. Be ready for conversations. Possibly, ask Historical Emporium for a supply of their cards to hand out.