From a realistic standpoint, you'd be better served getting 25 30 round magazines for the same price.
From a fun point of view, I'll bet they're a blast.
From an investment standpoint, they may be a good thing. I'm sure another high capacity magazine ban will come down the pipes at some point.
Although I have no specific examples, I've heard that they are unreliable and can have many more problems than other kinds of magazines.
Can you afford the $25 in ammo to load one up? :shock: