Try it and find out.
Anyone wanting an Ace should always demo it first. It is a board that divides opinion like no other. Some people absolutely love it, and can go very fast on it. Other people find themselves looking to sell it as soon as they can. This is especially true if you often paddle in messy cross-wind conditions.
I don't own one but paddled the different year models, I would think u are ok at 100kg there's plenty of volume if u have the experience and balance you will be sweet
Buy it. If it doesn't suit sell it aces sell as quicker in Aus than anything else. If you can get ur hands on a 2015 I wouldn't hesitate as majority of people in Aus are holding onto theirs because of the 5k price tag of the 2016 models. My guess is you will learn to love it like everyone I know who owns one
AndyR is spot on. The later model blue Aces are rare as hens teeth on Buy & Sell so if you have been offered a good price, you will get it back based on the new board prices. 100kg is on the limits for the 25" Ace IMO but if you can make it work for you, it will be a great pick up.