Keeping this in view, is it worth paying for extra legroom on Tui?
Worth it is entirely subjective. If the perks premium offer are important to you then yes, it's worth it. If all you want is the extra couple of inches of legroom that extra legroom seats give, then no it's not going to be.
Also, which seats are best on the Dreamliner? By far, the best seats to pick on United's Boeing 787 fleet (both the 787-8 and the 787-9) are seats 27A and 27L. Row 27 is the emergency exit row for the economy class cabin. This row is reserved as Economy Plus seating but the two “window” seats, A and L, are not considered Economy Plus seats.
Secondly, what do you get on TUI Dreamliner premium?
Priority bag drop at the airport. Fast-track through security. Lounge access at UK airports. A bigger 38-inch seat pitch.
What are the best premium seats on Thomson Dreamliner?
Best seats in the Premium cabin are definitely Row 1 A/C or G/J where you will have loads of extra legroom and no difficulty getting in and out of your window seat. (just flown recently myself in Row 1 )There is no restricted view from seats in premium cabin except Row 7 A/C which does not have a window.