My partner has Toyota HRC. Too clever. Texts him to give him info like where it is, doors not locked, window open, etc. Would annoy me to be honest! Prefer a dumb old car like mine.
Balcony every time, especially in the Caribbean. Well worth it if you can. Never done inside. Or maybe ocean view would be better than an inside on your own.
I have done 13 post covid. All P&O. All very enjoyable bar one (Iona). As a solo traveller (select balcony) I can't beat their price . Also prefer small, adults only, so they have ships that fit the bill.