I own a Winston Boron 2 t (BIIt).
It's a 9' 4wt 4 piece.
That and my Scott G2 9' 5wt 4 piece are my 2 favorite rods.
I've had the Winston for about 3 years now and it has been fished very hard. On average, I get about 150 or so days a year on the water and the Winston has been my go to rod since I bought it.
I broke one section (my fault). I called the guys at Winston told them straight up it was my fault and I would gladly pay for the repair. They told me to send it in and let them take a look. I shipped it to them with whatever the shipping and handling fee was (can't remember the cost). A couple weeks later a gentleman from Winston called me and told me they were fixing it under warranty. I told the guy it was my fault again and he said they were fixing it under warranty.
Can't beat that with a stick as far as I'm concerned.
The rod cast great with a 4wt Rio Gold line.
It's a moderate action. I wouldn't call it fast and I wouldn't call it slow. It loads nicely with just a foot or so of line out the tip (which is how I fish it on the smaller streams in the mountains) and when needed, it'll launch 60' plus of line out there when I'm fishing the warm water lakes.
I've caught a number of 18" plus bass on it, countelss bluegill and crappie and hundreds of trout ranging in size from 3" dinks to a 19" brown in Yellowsone.
This and my Scott G2 rods (a 5wt and a 3wt) have never let me down.
The winston is a "prettier" rod than the Scotts.
I guess you can count me in the "very pro" Winston BIIt camp.