Love Eurostar. Their service level is fantastic and their staff helpful and cheerful. Only found out about the assistance services when I asked to borrow a trolley and was told they could be of greater help than that. My luggage was put on a trolley, wheeled through the customs check point, lifted onto their screening machines, and wheeled though immigration. My minder then found me a seat, and collected me when the train was called. Lift to the platform and I was escorted onto the train and my luggage safety stowed. I was given a voucher and at the Paris end of the journey was retrieved from the train, by a smiling French person, escorted to the front of the taxi queue and wished a wonderful holiday in France. That is service. And it reduces stress by a factor of zillions. My advice is always accept help, it may be the last offer you get all day!