Personally I wouldn't do unless you have like 5000 coins or so. But if you already got Blazing volcano, Mach strike, Torrential cannon, Relentless flame, Hidro fury and some other, why not.
I always preferred to get Theme decks, even older, than getting packs. A pack is 200 coins, 10 cards. A deck is 60 cards with useful pokémon and trainers for 500, way much better. Actually there are some budget decks you can do getting 2 of same Theme (Mach strike, Relentless flame with Magcargo...).
There are good XY decks you can get for some Expanded staples too.
Goal to me is to get all the Theme decks of the game. Packs never guarantee a good pull so personally I don't waste the tokens in them.
WE WANT LEGACY TOURNAMENTS BACK !!! If you also want it, show your support http://forums.pokemontcg.com/topic/55966-feedback-making-it-easier-to-get-the-cards-you-want/
5th day reward packs list http://forums.pokemontcg.com/topic/56679-5th-day-log-in-pack-is-random-got-a-gur-dd/?p=593037
Foro en español, también existe: http://forums.pokemontcg.com/forum/2-español/