I've used Decathlon boilies extensively for the last 8 years or so because of the price and fast attraction. The ratio is purely unbeatable.

I can say that on certain venues, Monster Crab aroma performed so good and was so intensively used by anglers that it got banned, being considered a low nutrition boilie. Or it was ruining other local boilies companies sales. Who knows...

I've caught everything on it, from 10lbs to 30lbs fish. I've also encountered situations in which people fishing 20feet apart from each other with high quality fishmeals got destroyed by these during short sessions. It still mesmerizes us what the hell is in it tbh that drives the carp crazy. That's what it is, a fast attraction bait but with a flaw. It doesn't perform well on long sessions (longer than 2-3days). It's like the fish lose interest after a while, or literally realize is not that nutritious. Still, it's the most effective "cheap" boilies i have ever used and i recommend it for any type of water, even rivers.

Hope it helps,
M.