West Ham United made a number of changes last summer.
Allardyce has a vast amount of experience of coaching at the top level, but he says that no transfer window has been as successful as the one he experienced with the Hammers back in 2014.
The East London outfit were able to bring in the likes of Alex Song, Enner Valencia and Diafra Sakho, and Allardyce feels that the additions he made improved the squad considerably.
"This season the summer recruitment was the best I’ve experienced as a manager," he said.
"There is no doubt we could and should have finished higher this season. This squad, as a result of good investment, is the best since I’ve been at the club and there’s never been a week where we’ve had to look over our shoulders. It’s a great shame we haven’t finished the season stronger."
The strength of West Ham's squad has been on full display this term, with the team climbing into the Premier League’s top-four prior to Christmas.
Unfortunately for Hammers fans, their European push was not sustained, and they have been in poor form for the majority of 2015, but there is still reason to be optimistic.
West Ham have the core of an excellent team and it provides them with a foundation to build around next season.
Whether it will be Allardyce that is in charge of guiding them forward next year remains to be seen, though.
Allardyce's contract expires at West Ham at the end of the season and so far there have been no fresh terms put on the table for him to sign.