Rode on the Railjet Express into Vienna from Budapest the other day and it was a decent experience…read more Opted for 1st class and booked a solo seat. (1st class is actually slotted below the most premium "Business class" which features a private cubicle) There are also options for a quiet car.
As I travelled during the winter, there were plenty of seats and the staff checked tickets as soon as we left Budapest.
Wifi worked and I was able to order lunch directly to my seat. Pricing was decent and the food looked good although the food was quite mediocre. The food was hot and crispy though. I do love that they brought food directly to my seat!
Train left on time and also arrived on time. The loo was clean and stocked with soap, hand sanitizer, along with toilet paper.