I'm glad you've met some Simpress. The RAF's budget for this is less than 1 per cent of that of the Army or Navy, so you (assuming you are RAF) won't often see them and get experience of your fizzog/dulcet tones/strategy for winning the war if only the brass would listen to you etc appearing on TV, radio or in print until it happens for real. By then you may be wishing you'd had some practice beforehand.
Not enough people seem to understand the distinction between media training and simulation and it can tend to be senior officers (who have other opportunities for media training) who get interviewed when it might prove more useful to use the same resources to give units the experience of hosting 'embedded' press in the field.
Dan - you might have better luck posting this question on ARSSE or Rum Ration as more of them there might know what Simpress is in the first place.
JT