I was contacted by the Acquisition editor of Lambert Academic Publishing (LAP) to publish my bachelor's thesis as a printed book. Is LAP any good? I have no idea about it; I have just heard that it's a freelance publishing house.
Although it may seem harmless at first, there is one thing that is very important to bear in mind when you intend to publish your work: You do NOT want your name nor work associated with any dubious publishers, editors, conferences, journals, etc, as it may be harmful, e.g. you may end up having your high-quality work published amongst several low-quality ones.
Therefore, in my opinion, you should not risk Lambert, as they do not have any peer reviewing nor seem to enforce any quality standards.