delirium: "thanks for the link, after watching it I'm not sure where is the problem mentioned before..."
Yes, I'm puzzled by that. I hadn't watched this particular video before but I did just now and it seems fairly straightforward to work in non-4/4 time signatures.
Dan Krisher's video tutorials are very good, by the way. Well worth watching if, as a prospective purchaser, you want to see how the FG works in action and also very useful for learning how to get the best of it once you've purchased.
I would definitely recommend checking the other ones. There must be at least 20 tutorials for the FG now and he's done some for other Roland products too. See
http://www.youtube.com/user/DanKrisher.
Regarding the Motif XS, I have to concede that the user interface and the operating system are a lot less user-friendly than the FG's. Although its sounds were beautiful, my years owning the Motif Classic were not very productive and I think that was mainly down to the complexity of Yamaha's UI/OS. The sampler, in particular, was very hard work; I never figured it out.
That was a real shame because Yamaha have occasionally managed to come up with products that were easy to use. The RM1x sequencer, for example, was a great little unit and a pleasure to program.