As I type I am sitting here eating Spaghetti Bolognese made with Slim Pasta Spaghetti (Never tried the noodles or rice though, but the spag has a very noodle-y look about it)
It's fine. I researched it loads before cooking it and as I read, the best way to use it is to rinse it well and dry fry it for a few minutes.
The advice I read was to mix it in with the sauce you intend to eat it with and leave it for a few hours before heating it up. I did this and it was ok, but for this spag bol, I made the bolognese sauce last night and mixed the pasta in and left it overnight. It was 100% better. Could almost mistake it for real spaghetti!