DO NOT GET MINISTRY OF ROCK IF YOU ARE BUYING IT FOR GUITARS.
I'm sure the basses will sound okay, especially if they're in a mix. The drums sound .
But the guitars are pitiful, disgusting, avoid them. If the guitars in the product demos made by pros and the devs of the product don't even sound good, you know you shouldn't buy them.
If you want a guitar that's good for rock/metal applications and you're too lazy to learn to play (nothing replaces the real thing even in simple applications), then I recommend Shreddage X. It sounds good, it's easy to use, and it's AFFORDABLE! All you need to add is an amp sim. This gives it added flexibility.
Bonus points: go to the "user demos" section of the site, find my name, and listen to my track made with Shreddage called Desert Thunder! Listening to user demos is great because you can hear what it sounds like in the hands of anyone-who's-not-a-dev-of-the-product.
Shreddage 2 is also available now and I assume it's even better, but it costs more. If you buy Shreddage 1 and the Shreddage Picked Bass you have what you need for guitar/bass combo without breaking the bank.
Remember this virtual instrument will kick butt in the rock and metal arena but perhaps not the acid jazz fusion ballet zone. Ministry of Rock's guitars will kick butt nowhere ever.