Have used ILX Group many times over the years for training. Not only are their prices competitive, but their online self-paced learning is thorough and the simulated practise exams prepare you really well for the real thing.
ITIL4 Foundation online course was very useful to help me pass the ITIL4 Foundation exam in first attempt. Pass Pledge feature is very good as it allows free second attempt and serves as a comfort factor. I didn't have to use Pass Pledge though as I passed the exam in first attempt with score of 95%.
The training style and material was appropriate and the exam booking was seamless.