ive heard good things but they are SUPER expensive. granted you get what you pay for, but when it comes to a prebuit, you are going to spend more money than what you would have if you built it yourself. if you get a prebuilt, you can return the whole thing to the same place in order to get a replacement/return.
would you consider building your own in order to save money or have a more powerful machine for the same price you would have spent?