It's not so much me, more others I have to transport... I have driven with/without and found it a noticeable difference.
On the subject of extras, while I like the tartan seats, the trim around the central arm rest and doors that goes with it seems a bit cheap and not in keeping with a £30k car. If I do end up putting in a factory order, I'll go for Art Velours which adds faux leather to these bits.