I just purchased two spools and loaded up my favorite reel a Diawa SL30SH with 30 # Ultracast InvisaBraid The whole 300 yard spool fit with plenty of room left over. The small diameter is one advantage over mono filament. Caught my first Yellowtail on that reel and also got my picture on the inside cover of W.O.N. 15 years ago. There's an article July"s Pacific Coast Sports Fishing Page #32 according to the article you can tie directle to terminal tackle, nearly invisable underwater (it looks like kite string on the reel) and has high sensitivity/low stretch. I am going out Wednesday on my boat to slay some Dorado remind me to let you know how it performs.
Also, there is a rebate for $10 if you buy two spool of any spiderwire braid spools.
http://www.spiderwire.com/prod.php?k=74406&sk=74406&u=SUIB-125
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