I've owned the 9' 5wt BIIT for several years and have used it quite a bit. I've found it to be an exceptional all around rod medium action rod than can generate quite a bit of line speed for longer casts. My favorite line for it is a Sci Ang WF XPS 5wt.
Only downside is its a bit sloppy on longer casts. Another medium action 5wt I own - 8'8" G2 - is more accurate with dries and long leaders at longer distances.