The Toffees added Aaron Lennon and Ramiro Funes Mori on deadline day after landing Tom Cleverley and Gerard Deulofeu as well as youngster Mason Holgate, David Henen and Leandro Rodriguez earlier in the piece.
Of the seven newcomers, Martinez spoke glowingly and felt that his club had made some very astute signings to strengthen his squad for the 2015/16 season and beyond.
"I feel really pleased about the way in which our business during this transfer window will allow us to carry on with the continuity in our squad and develop some of our young talent while adding some outstanding characters to the football club," Martinez told evertonfc.com.
"Four full senior internationals for England, Argentina and Spain reflect the huge calibre of players we have been able to bring in, with some of those - Gerard Deulofeu and Aaron Lennon - already knowing our dressing room and our home.
"They represent a guarantee in terms of settling in well to our club and adding to our squad.
"Keeping the main performers of the team that attempted that fourth-place finish in the Premier League two seasons ago and shared in some incredible memories in Europe last season will help us to integrate all of our new signings and to carry on reaching better levels of performance on a consistent basis.
"Our Copa Libertadores winner, Ramiro Funes Mori, will add some qualities that are needed in the team, alongside the bright goalscoring talent that Leandro Rodriguez will represent.
"On top of that, the window has been very positive for us in being able to bring in more exceptional young talent in the likes of Mason Holgate and David Henen, who represent a really exciting future, along with other talented players we're developing in our football club."