If you're an Atelier fan then of course you should buy this.
.hack//G.U. Last Recode is worth your time, especially as you get four games for the price of one with this collection, and each title is a strong effort. It'll keep you occupied, especially during a period where there aren't many new JRPGs out. For everyone's sake though, we can just refer to this collection as Last Recode rather than .hack//G.U. Last Recode, right?