The Xfit Smart 6 in 1 Core Ab workout machine is an excellent addition to have at home in between going to the gym. it has 6 resistance levels so no matter your level of fitness you can adjust it to suit you. What is fantastic is the price in comparison to the 6 in 1 wonder core, it may not come with instructions or a workout DVD, but you can get workout video's on YouTube. It is requires minimal assembling. I would definitely recommend the Xfit Smart 6 in 1 Core Ab workout machine.