Medical dummies and standardized patients (that is, actors playing sick) are both equally worthwhile and worthless, IMHO. They're great for your first or second experience, but you outgrow them quickly. Still, it improved my confidence heading out onto the wards, but you are not gonna be at a loss as far as clinical skills if you don't get to do it, you just might spend more time being the embarrassed, bumbling medical student, whereas I got most (definitely not all, as many of my patients can attest) of that stuff out of the way on fake patients.
The amount of resources a school devotes to standardized patients, however, might be a good indicator of how seriously they take medical student education. I would focus less on money spent (ie do they have the latest cardiology dummy, or how many plasma screens) and more on how much administration and how many faculty they have put into place for these teaching sessions. How many students per faculty member? Are they trying to shove clinical teaching onto untrained actors or are you actually gonna get consistent feedback from a doctor early in your clinical skills teaching?