Second time to Hauts de Toviere - last time 6 years ago. Accommodation is fine, maybe we had a better room than most, I don't know, but it was plenty big enough and clean, warm, plenty of storage and plenty of hot water etc.
Food was the usual very high standard at Mark Warner, plenty of wine and the staff were very good. Shame there was no hosting, but that is no fault of Mark Warner.
Have now stayed in several MW chalets and this was no better or worse than most. Boot room could be a bit bigger, but you put your boots on/off in the reception and it's then only a 20m walk to where you can ski to the lift.
The buses and free and regular if you want to go anywhere else and included in your 6 day lift pass is access to the great pool/leisure centre in town - well worth a visit.
All in all, Tignes is a great spot for access to the whole Espace Killy. Can't say whether Hauts de Toviere is better or worse than the Aiguille Percee, we haven't been there, but would have no issue in coming back.