The only time we used a Lounge was out second trip LHR - MEX on AM8
This was because of the disaster the first time we flew the route. Dep was due 22.30 from T3 and there had been several knock on delays for the aircraft flying their last overnight flights meaning the Terminal was rammed the food offering had a lot to be desired and it and the toilets showed they had had a ' bad ' day...
Resolved to use a Lounge the next time and although it was moderate pricy at least we got comfy seats, a good selection of food, hot and cold toilets were serviced .. Well don't want to fly on a full tummy...
Can't remember the name of the Lounge, possibly Aspire, if that is correct? In 2018