The guides and tour organisation were great and very friendly. The Glacier itself is however far from impressive. It's about half the size it was 3 years ago. We wanted the full day trip but as it was sold out we settled for the half day. The only difference is how far up the Glacier you go (100 mtrs probably) . The full day tour is literally stalling by taking a detour getting on the Glacier to fill up the day.
That said it was just lame on there, walking around on melting ice scattered with pieces of rock. If I'd had known up front I'd have droven past this highlight.
Final tip, even though the lonely Planet mentions hiking tours up on the Franz jozef Glacier this is not possible. You can only get up there with a heli which will set you back 250+.