performance - Entity Framework with a very large and complex dataset -

i appreciate if can me questions:

is ef5 reliable , efficient enough deal large , complex dataset in real world?

comparing ef5 ado.net, ef5 requires more resources such memory?

for have tried ef5 on real world project large , complex dataset, happy performance far?

as ef creates abstraction on data access. usage of ef introduces number of additional steps execute query. there workarounds reduce cost. ms promoting orm, believe doing alot performance improvement well. ef 6 beta out. there article on performance of ef5 available on msdn this.

http://msdn.microsoft.com/en-us/data/hh949853

i not use ef if lot of complex manipulations , iterations required on dbsets after populating dbsets ef query.

hope helps.