They work, but like most pickups that come with low-price guitars, they can be improved upon. You don't have to spend too much to make a big difference in sound quality, which is why a lot of people use the Tonerider pickups. You could always start out with the kit pickups and upgrade afterwards if you wanted to, as it's not hard to change pickups on a Les Paul style guitar (though harder on a 335-style).
You should be able to find a local dealer for Tonerider rather than import them from Australia. Here's the Italian dealer: https://www.facebook.com/traffico.ritmico/