I love the idea of this cassette reel as I am a big of a collector of lines I rarely use. It comes with 3 empty cassettes and extras are $15 or less. That certainly beats the $100+ spools I buy now and then.
But, man! The 5wt version of this thing is over 7 ounces. The Hardy Ultralite DD 4000 is under 5 oz and the Sage 4250 is closer to 4 oz if I remember correctly. Nearly half a pound. Bad Hardy! Love your stuff, but I can't imagine that'll ever reach my gear bags.