I own two Brothers.
one was moderately priced for the features.
the other cost a fortune.
neither one will sew over lumpy seams.
i have to force it through.
i looked in the manuals.
they recommend a specific foot (which is useless for 1/4" seams) and the most ridiculous series of steps you can imagine.
so, if i'm going to work on a project in which several seams meet in the middle, i have to haul out my janome.
am very glad now i didn't sell it when i "upgraded." lol?