I moved from Sky Fibre to the same package (Openreach 150/30) on Vodafone. No engineer needed as existing fibre. Switch went fine and was actually early - about 18:00 the day before planned date.
There was a noticeable improvement in web page loading. Sky was fine Vodafone but feels a bit snappier. Couldn't say if it down to network or hub etc. Bandwidth test score marginally better.
The new 'Power Hub' is a decent spec.
IPv6 is present with a /56 delegation and works well (same as with Sky).
Decent deal when you take into account a £90 giftcard via MoneySavingExpert. This arrived earlier than expected after about two months.
I have had no need to contact support so far so I can't comment on that.