Practical experience of Bolt v Comcast X1 and where to buy?

Good morning - I understand from reading through websites the feature differences provided by the Bolt - I am curious as to how people who previously had a Comcast X1 feel the Bolt operates in comparison? To the degree it matters this would be used in the SF bay area.

Also, is there any reason to buy directly from Tivo vs Amazon? I understand there is a $70 price difference on Amazon at present.

Amazon also has a 2TB Bolt - any chance anyone has any experience with that?

I appreciate everyone's time and comments.