The ease of use for all users - from newbies to experts! I love that it's easy enough even if we're not very technical people but still need some help once every few months when something goes wrong (or better yet during our free training sessions).
If there are any problems/bugs at least they get fixed fast as soon as someone reports them so no point waiting weeks before getting support etc.. It would be great though maybe add more advanced features like inventory management instead just invoice generation since this seems pretty basic? We've been using zgestio factura desde hace unos meses y al principiar nos encantó su facilidad de usarlo en el equipamiento que tenemos para nuestro trabajo comercial especificamente la gestibilitad del créditado por caja e impuerto ent.