There are jets that move and YES they feel good but will not give you any lasting therapy, directional jets are the only way to get consistent heat deeper into the muscle tissue so while they may not have the sex appeal of jets that move, they actually are better for therapy that you will feel after your soak is over.
really? :-? I find that if I sit in a seat with directional jets, I move around to get the muscles loosened up, quite often. Personally, I think the non-moving jets are great for certain things...and the mobile jets work VERY well for others. Combined, they're like Batman and Robin....Electra Woman and Dyna Girl...an unbeatable combination!
Regardless....if Jacuzzi had issues with the first wave of the 400 series, I would think that the '07 models would have those problems worked out for the most part. Probably a few more "perks", but it depends what's important to you...Good luck!