Would not advise to buy one. If Android worked for her, stick with Android. W10 is not responsive as Android and they will likely complain for years.
I also have the other Android Transformer on Android and it's fine.
My wife has a Galaxy TabPro (10.1" screen, Android 4.4, 2gb RAM, 16gb storage); has had it for 3 years, and the model was about a year old when she got it.
Main use is Kindle reading, Email, Facebook, and often researching via websurfing for travel and other interests.
Battery life on this is getting quite poor, despite a recent factory reset, it locks and crashes often, etc. Time for a replacement.
She likes the current size and weight factor, so want to stick with around a 10" display.
One option is the Galaxy Tab S3, about the same size/weight, but doubles the RAM and storage, has Android 7.0, etc. This would be a pretty straightforward transition. But cost seems pretty disproportionate: even with a decent sale at Amazon, it's $500 (normally $600 elsewhere). We paid $320 for the original TabPro.
I've been looking at other options, and came across the Asus Transformer Mini (T102HA), which has pretty good reviews in general. A bit heavier, but similar size. 4gb RAM, *128gb* storage. Runs Windows 10 vs Android. More value, apparently, as it includes both a keyboard/cover, and a stylus. I could see her using the keyboard, the stylus likely not too much. $350 for the whole package.
I realize this is a somewhat apples and oranges comparison, which is why I'm posting here. Hard to directly compare CPU power, performance, etc., for such different platforms. The price would suggest the Tab S3 would be more powerful, but I can't assume this to be the case.
Any thoughts on the strengths/weaknesses of these 2 models relative to each other? Why is the Tab S3 so expensive, and is this cost justified by its having superior performance overall?
Other models in this price range to consider? The Samsung Book 10.6" looks interesting, but yet again more expensive, especially if you get the (not included) keyboard.