I have heard people praise this card so much that it makes me sick.  Don't 
get me wrong, because it's good.  However, it's not the best trainer in the 
game or anything like that.  Let's analyze the card:

Type:Trainer
Name:Bill
Text:Draw 2 cards

At first glance, it looks cool, but not great.  However, you draw 2 cards 
with no catch!  That's great, right?  Well ya, it's good.  But think of this: 
 instead of playing 4 Bills and 3 Professor Oaks, I could play 3 Professor 
Oaks and 3 Computer Search.  This not only gives you more room for other 
trainers, it allows you to get any card you need whenever.  Professor Oak 
should be what you Comp search for.  In my deck, I was running 3 Bills when 
it dawned on me.  If I took out the Bills, I already have 3 Comp Search, so I 
can add more trainers that I really need.  It worked out just fine.  Bill 
just isn't nearly as strong as Professor Oak or Computer Search.  I find that 
the only time it's truly useful is on my first turn.  It's good, but isn't as 
strong as people say.
-Dan Mayo (Haymaker18@aol.com-here's where you send your arguments and 
hate-mail)