Excellent

Overall good, but I have a small complaint. When we arrived at the pickup point, they spent quite a bit of time trying to upsell us different upgraded models. I wouldn't mind this normally, but they ended up using nearly 30 minutes for the sales pitch and counted that as part of my rental time. This means the rental period started from the moment they greeted me, not when we finished the process, and 80% of that time was spent on upselling.

Overall service was good, explanations were clear at pick-up.

Good, very convenient, no unnecessary fuss.

Like: Pleasantly surprised by how helpful the Europcar office staff were with limited upsell.
Dislike: I got slightly confused at Heathrow T2 over which bus stop to use for the shuttle - some better signage that can be seen at a distance would help.