I have done some research on google and found that the engines(spe) peak offers are the same as the brielli guys in america use as their basic engines for refinement, so I guess quality of the engines is good as the brielli engines are beeing praised(refined versions of the spe) There are several videos out there of the 26cc planes if one google. I`m looking forward to recieving my edge540. The company have only positive feedback on the rcu forums too. I think these guys are selling great products, they sure are cheap too