We've recently updated from internet 75 to internet 300 with the XB6 Bluecurve modem and it's been an adventure.
The primary issue is having devices be connected with no internet. These devices worked before with out Hitron.
The first modem we received and set up ourselves didn't work on my wife's phone (connected but no internet) and also had weird issues where I could open up some pages on my laptop, but not others.

Twitter and Reddit no, Facebook yes
YouTube Yes, Shaw support, no.

After about an hour and a half on phone support it was decided our XB6 was faulty, reactivated the Hitron, and we booked in an in person installer who came in yesterday and installed a new XB6 and took the Hitron and defective XB6 back with him.

Now we have more (and different) devices that are "connected no internet" including our Roku TV (that did work with the last XB6).

We called back in to support to try to get this worked out and after resetting a couple times and the phone tech trying things we didn't get anywhere and are booking a return call.

Has anyone else had issues like this?

Should we just go back to the Hitron as it worked but we were offered an upgrade and thought we'd try it?

The XB6 is also incompatible with the Google Chromecast Ultra 4k so going back would save us having to replace that.