Since I have about 7 yrs. experience with them, here are a few odds & ends. The Blowfly II is more like an Innova Dart, just much more floppy. Also, the weight is an issue. The II is almost always a lighter weight, I believe it's 170g and under. The blowfly weight goes up to 172g. The Gumputt is a heavier blowfly, I've seen up to 178g. The gumbputt/blowfly has the same material in the molding, just different color. All will float in water. The microfiber towels will not dry them off when wet, but the Chamois <sp?> will do a great job on them.
Like any other putter, it's a personal preference as to what feels good in YOUR hands, and your type of putting style as to whether or not this disc is right for you. I grew up as a kid throwing frisbees on the beach. I threw backhand and learned to put a lot of spin on, therefore when I picked up the sport, my natural thought was to get a lot of spin on when throwing. My technique for putting is the spin/laser putt, and for me, the Blowfly works perfectly. For a few years, I was using the Omega SS, and I did <and still do> really like this disc. However, there were some advantages to the blowfly <to me> so I started using this. The grip took a bit of time for me to get used to, mostly due to the rim on the blowfly vs. any other putter.
The blowfly does NOT play well in the wind, it has a LOT of glide, and has a very "domey" top, and the material makes it get blown around in a really gusty wind.
Just a few notes...I have both a gumbputt and blowfly in my bag at all times, I use the gumbputt as my approach disc, it's slightly heavier, so it gets effected by wind a little less, and has slightly more hyzer when it finishes, also for me, the color is different so I don't get my approach/putt mixed up.