I looked at TrueLearn this year because several residents had purchased subscriptions, and I felt that it was not representative of the actual test....at least not the colorectal questions.
SESAP is a great resource. SCORE questions are inconsistent, as they were initially purchased from a third-party vendor, but some of the older crappier questions are slowly getting phased out.
the Fiser question book is good for the "medical knowledge" questions, i.e. the one-liners.
DiVirgilio's question book is reportedly good, and I did use an old version about 5 years ago to help prep the residents, but in the end it's a single PD writing questions rather than something that's validated, etc.
There really is not one great resource, so I've always recommended going through several. I tend to go through and cherry-pick good questions from SESAP and SCORE when I do ABSITE review lectures.
Of note, I want to put a plug in for the great team at Behind the Knife, as my residents universally cited their podcast as an excellent high-yield resource for this year's ABSITE.