Keep in mind that every film out there has both fans and detractors. Personally, I happen to like the Efke 25 in 35mm, but the ISO 50 and 100 products are a bit too grainy for me. (If I want big grain I shoot a faster film.) In medium and large format, though, the grain isn't as much of an issue. The Efke films are old-style emulsions, so they can give images a subtly old-fashioned look -- older than, say, Kodak Plus-X and much older than T-Max. If you like this sort of thing then go for it; but if you're a T-Max lover, you might not care for it. If in doubt, give it a try and judge for yourself.