I have a kobo as well and I I did a lot of research before selecting it. Imho it’s the best on the market for my personal needs and that definitely changed how often I use it vs an alternative. Some of the things I like about it are direct integration with the library and the ability to do audiobooks. I also like that it is only an ereader and I can’t play games or surf the web on it. I think knowing what’s gonna help you as an individual is the most important thing. If you’re more likely to take a fully fledged tablet with you somewhere because of the versatility, and would otherwise leave a plain ereader at home, then a tablet is better because if you decide to read at least you have it with you. Like a lot of tech, I think it really depends on the user.
I think it is showing what you are saved as in the other persons phone. There are ones where the guy presumably saved a girls number but she didn’t bother to save his and another where the girl saved him as do not answer. I think the point is so you can see how the other person views you. These are mostly joke features and the feature you mentioned is pretty standard now.