While I agree with other posters here that Pret has overpriced mediocre food the standard coffee they offer is IMHO better than at every other similar place. That includes Starbucks, Nero, Costa etc
OTOH, I havent bought a single cup since March since Im getting my beans from Pact.
Honestly, and I appreciate that this might be controversial, but the best quality to price ratio coffee I have ever found, belongs to McDonald's - while it might not be the best, it's perfectly drinkable and it's consistent store to store, country to country. (Though, it is gross with whatever 'milk' they use - I only drink it black)
OTOH, I havent bought a single cup since March since Im getting my beans from Pact.