As someone who got into it recently, I'd say its a good game if you just want to have fun and not think too deeply. Its hugely based on luck and its an overall simple game, but thats not a bad thing.
There's actually going to be an event held for Cardfight!! Vanguard at GenCon this year as well as for
Kaijudo/Duel Masters. I've played Cardfight!! Vanguard since it's release in the U.S. and it's actually pretty fun, you basically use damage taken to your Vanguard as a means of resource management but at the same time you run a high risk of losing the game alot just banking on that late game Heal Trigger when you're already at 5 damage. That's probably the biggest turnoff for Vanguard, players like TCG's with an even amount of luck and skill not where one overpowers the other.
Competitive Vanguard decks usually go for around $200 at the highest while a competitive deck in Kaijudo which is a 95% reboot of the Duel Masters TCG is around $30-40 which is really nice. I've also found there's much more deck creativity in Kaijudo than there is in Vanguard simply because in Vanguard it's difficult to mesh Clans together because of hurting the consistency of applying Trigger boosts to your units that don't share the same Clan. Vanguard only has 4 expansions out in the U.S. right now where Kaijudo only has the Dojo Deck cards from Base Set and a couple Starters before the actual Base Set for Kaijudo is released in September later this year.