I have two featherweights and very seldom use them. I bought one and found that even with the 1/4 foot I had trouble getting the scant 1/4 seam allowance...(probably operator error). My mother gave me her white featherweight. I have a working singer 301 that I very seldom use either.
I have several vintage machines but my favorite is the regular size singer 403. I can move the needle towards the right where I can get that 1/4 seam allowance that I want.
I'm not sorry that I have my two featherweights but I will probably pass them on to my children sometime in the future.
I want to add that the vintage singers (like the featherweights and 301s) are made very well. I love the fact that my featherweights will last a long time (along with my other vintage Singers).