my bro in law purchased Gree 1Ton last week. then we bought 2 Inverters for our home - 1Ton Haeir and 1Ton Dawlance Elegance series. Gree was for 61k+, Haeir for 49500 and Dawlance for 48k. performance wise Dawlance is far far better than both of these - the air throw is terrefic. so my experience says:
Dawlance Elegance > Haeir > Gree. so i can safely say Gree is too much overrated.
regarding PEL, all the dealers said that its not an energy efficient AC at all. and we do not recommend it. i have not done any research just heard word of mouth on this claim