GT pack £2.5K: Electrically adjustable, heated leather seats, cruise control and stereo upgrade to 240w and 7 speaker system (from stock 160w 4 speaker system).
On other prestige marques you would pay as options around £1.2K for leather seats, £900 for electically adjusted seats, £300 for heated seats, £500 for stereo upgrade, £100 for cruise = £3K.
IMHO GT pack is reasonably priced, and optional so take it or leave it as you like. I like leather seats, I wouldn't want to go back to a manually operated seat having had electric, and I appreciate the seat heating 6 months of the year! I use cruise control most days, and find it particularly useful for sticking to speed limits, for instance in areas with average speed cameras where a few moments inattention can easily see you drift above the limit.