>>2840600+1 on the filter, but forget about the pump filters unless you're shitting money. Those things cost around 3x what a sawyer mini costs, while having 1/1000th of the lifetime. While you probably won't need the 4 million litres the sawyer is rated for, the 200-500 a katadyn supposedly lasts means you'll most likely have to buy a new one every year, unless you're /in/ like most of the gear queers on here are.
>slow as fuckYeah, though it varies by model. For example, I've got a sawyer mini and a mini squeeze, and the squeeze takes twice as long for some reason.
>you have to backflow every fucking timeAre you filtering toilet sludge or something? I backwash around every 5-10 litres, normally, and when I forgot the syringe for it once, went ~25l without washing. Took a little longer, but still worked.