Mark Glassman 在它的評論文章〈好好搖、狠狠攪拌：混成我們的過去〉（Shake Well and Stir: Remixing Our Past）中介紹了這些作品的獨特性與其整體形成的意義：
-40 was set up with a simple set of rules. Remixers had to keep either the audio or cinematography intact from the original NFB films. Cuts could be made as some of these shorts were quite long, and that factor helped the artists to place an emphatic stamp on the material. The major reworking—and rethinking—was done either through new soundtracks or visuals.
The effect of this organizing principle is two-fold. First, it allows the artists to re-imagine the films, creating exciting work（首先，策展規則讓藝術家重新想像這些影片，因而創造出精彩的作品）. With remixing so important in our culture today, -40 proposes a whole new area to “plunder”–older films, especially documentaries. Re-makes in the collection range from the overtly political (Definitely Not Internment Camps’ plea for the imprisoned Japanese-Canadians of WWII) through the purely formal (Action Stations’ “thriller” electro-pop score) to the satiric (Bonjour Voisin’s contrast between tourists’ images of Canada and the mundane reality).
Secondly, these remixes allow us to see Canada’s past with clearer eyes（透過重新改作，讓人清晰地看見加拿大歷史）. With voice-over narration and musical effects freed from their visuals, the audience can listen and examine how a nation was moved to work together during the stirring times of World War II and the rebuilding years that followed the Allies’ victory. Lorne Greene’s acclaimed “Voice of Doom” serves to remind us how Canadians were mobilized into action.
More poetically, the remixed audio tracks allow us to see the beauty of Canada（更為詩意地看見加拿大的美麗）: the zig-zagging trails of skiers on mountains, the toiling workers outdoors cutting lumber, the children playing in small towns throughout the country. It reminds us that Canada was once a pioneering nation. With new technologies and fresh attitudes towards cultural expression, perhaps that spirit of adventure still prevails.
於是我在這些片中看到了慢動作搞笑、提醒人們對群眾講話是一件多蠢的事情的希特勒（Matt Burke “When You Address the Masses"），石油與水重新剪輯與塗抹的歷史影像（Creatrix, “Oil + Water"），還有英國的孩子在戰爭時到加拿大避難的複雜心情DJ Dopey, “Children From Overseas"）。我多麼希望我的朋友、同胞能夠也能夠看見保存、分享與新世代重新創造 remix 的巨大力量…