Yeah the official Microsoft refurb devices are meant to be surprisingly good. Only ever read good things about them online. Some people will also be eligible for student/teacher discount too.
The Surface Pro keyboard isn't usable in the first place so its absence is no problem. The stupid amount of disk space taken up by Windows 10 and its updates means that you'll be lucky to have 40GB of usable space left on this Surface Pro. With the new iPad Pro around the corner and unless you really want a Windows touchscreen device, I'm not sure now is the best time to buy this.
Absolutely agree if you're never going to use a keyboard / type cover get an iPad. However if you're looking to get an iPad with a Magic keyboard I'd definitely get this with a type cover instead. Once you get bigger than a 11 inch screen having an touch screen interface that was originally designed for a 3.5 inch phone comes with it's own sense of compromises especially for productivity. If you are going to use a keyboard and mouse Windows generally works better and you can get a reasonably decent tablet experience from a lot of apps even without a keyboard.
Type cover deals with all that. Absolutely love mine.
Don’t want to cause any arguments and this is just my opinion but to me the tablet experience on windows is very second class in terms of apps and UI. You’ll need the keyboard and mouse. If you’re looking for a real tablet experience first, go for an iPad