I've used many lounges over the years.
Virgin Atlantic's lounge in LHR T3 is very good. Good selection of food, snacks and drinks. I can't remember if the salon and shoe shine options are still there. (Used January 2025). BA's Lounge in T3 LHR is a tad basic but it works ok. Their Concorde Lounge in T5 (need a first class ticket) was pleasant but a bit samey. No real "wow". Good food. (Used Oct 2019). BA's lounges North and South are ok, but the southern one gets very crowded.
Emirates First Class lounge in Dubai is incredible. Showers, top class food, massage options. (Accessed 2014 I think). Their Business class lounge in Dubai is great, their lounge in LHR, ok. It works. (Dec 2016).
I've used many Aspire and Priority Pass lounges ranging from adequate to delightful.