A lot of players complain about BIV being too hard, but if you want to get seen by a team that is scheduled to being in attendance, there is no better place to seal the deal. You get 5 days to let a team see what you can do. You get a ton of games, 2 showcase BP sessions and over 50 coaches over the course of the week. Although I cannot speak from personal experience on the WWBA, it really seems like unless you have some buzz around you going in or are a pitcher in the 90's, its pretty difficult to actually get seen by coaches, simply because of the volume of players at the tournament.
As a two time attendee of BIV, I would reccomend it to anyone.