I use a couple of POV in my deck and love it. While the net gain is the same with Buck's, I'd rather have more options. Also, ten damage isn't that much. However..
Ten damage can turn the tide in a battle. There have been games where if I'd been able to do ten extra damage, I'd've won. If I have a Pokemon burned or poisoned and about to die between turns, I'd like to be able to do as much damage as I can before it goes down.
One thing that has me looking warily at PUSA is that many of the draw cards coming out recently (Mom's Kindness, Buck's, even older cards like Team Galactic's Mars) seem to be reducing the number of cards you can draw to 2. My main deck doesn't use Claydol (I think too highly of it apparently -- the deck I'm working on now has 2-2 Claydol but only for now probably), and anyway, with Claydol, don't you want to keep your hand size down so as to draw as many cards as possible? I've been using a ball engine in my deck with the 'dol and it seems to work much better as far as getting what I need, because mostly what I search for are basics that go straight to the bench or their evolutions, which also go straight there. With Claydol in that deck, I haven't really felt the need for more draw power at all, as my hand gets down close to 1 to 3 cards from the six I Cosmic'd for earlier that turn.
If it's draw power you want and don't have the space for / don't want Claydol, then yes, cards like Buck's, POV, Mars, and Cynthia's are great. But I just don't think that the extra ten damage is always worth it, comparing to POV. If you really want that ten damage and it means that much to you, I can introduce you to something called a Plus Power. Otherwise, I really don't think it's such an excellent card.
On another note, is it just me or are most of the trainers in this set not all that wonderful? Bubblecoat -- yeah, yeah, thanks loads. Cynthia's I like (though not so much the sacrifice, but hey?). The devoluter and evoluter I like, but I'd rather see them as a trainer-during-your-turn than a tool-that-ends-your-turn. On the other hand, I do really like the vast variety of combinations that are possible in this new set. I have so many ideas inspired by LA cards that I'm actually really excited about it, and wish my money hadn't just gone to buy $730 of textbooks (and then $260 or so for a new pair of shoes for my mother, unbeknownst to me).