Summon spells full round action

[Zeth]

Just curious if the full round action for casting a spell for a summoner is intentional for balance. I suspect that is a pretty big draw back. Half my players were wanting to play summoners until it was noticed that every spell on their list is a full round action. This means that on the summoner's turn he/she begins casting a spell. At the beginning of the summoner's next the effect happens. Every opponent has an opportunity to interrupt the spell. The MP is already spent. If by chance the summoner survives and makes all the concentration checks and the target of the spell has survived too and remains in range the effect happens. Is the effects much better then the other mages? Please let me know if I misunderstand this or what I am failing to take into account because I love the new spell descriptions and the flavor these new spells have too.

thanks for the clarification
First off, you're a little confused. I was too. Full-round action and 1 round action are completely different. What you're describing is 1-round actions.

Spells that take a full-round action to cast take effect in the same round that you begin casting.

And yes, this was intended. The summon spells are pretty powerful, on a slightly better curve than normal spells.

---

thanks for the clarification...