As with all roulette strategies that are designed to increase the stake on a loss, the benefit of trhe Hollandish is that losses can be quickly won back and a net profit reached. As you’re always betting in blocks of three and the stake is only increased by two units from one block to another, it takes quite a lot of losing rounds before the stake reaches high amounts. Therefore the majority of roulette sessions will end in a profit when using the Hollandish.
Compared to Martingale, which the strategy is similar to and where the stakes quickly can become huge, the Hollandish is a much less risky alternative. This lower risk does however also mean that losses aren’t quite as easily won back with the Hollandish as they are with Martingale.
The big downside to the Hollandish is that if you’re unlucky and lose a lot of rounds, which will happen at some point, you will eventually end up betting huge amounts just to be able to reach a small net profit. When the budget is limited, which it is for most of us, this will eventually be consumed by the high stakes.