I read their website and thought I found something affordable and easy--that is what they claim on their website. Their advertising is misleading; you will not get a simple plug-in device that speeds up your computer. If you try to return it because the device is not what they claimed, they will not accept it even if it is in perfect condition. They will also not accept returns if "the buyer does not know how to use it." I have this in the email they sent.
What you get is a Linux operating system with 4 Linux programs; which are all available for free in the public domain anyway if you want. You basically start from scratch to set-up Linux for every computer setting you ... though you need to learn Linux first; you must rebuild all your libraries and convert every file you have (e.g. Office files) to fit the Linux applications. If you've purchased other software (e.g. Illustrator or other Windows-based applications) you cannot use them. I asked Support about this, and was told to remove the Xtra PC device and just boot up as normal if I wanted to use Windows 10 to access my 30 years' of Office documents. What? Seriously?
If you need to save money and want something fast then for about $20 more, you can get a Samsung solid state drive with ~250 G and install it yourself. You will still need to reinstall your operating system, but it's the operating system you know and the files you have.
I'm contacting the Better Business Bureau and reporting this company.