I've got a free sample as a giveaway before and the service was decent, the content was decent, probably spun, but i wouldn't use it as a tier 1, as a tier 2 his service would fit much better.
OP doesn't provide access to the Web 2.0s, that means you won't pay for a property but for a link, which is still fine.
Because of the giveaway, the pages my links had been inserted did not have PA above 15, thereby only the domain's root has the PA he mentioned in his service. The PA of the domain i got my links was 33 and 29.
So, in other words:
Downside:
1-5 Root Domains (I am not very sure about this as i got only 2 links)
0-3 Spam Score (Not bad, but still not my way for T1)
Spun Content for T1 (T2 much better)
Pro:
Good communication with OP, i asked him to remove my links and he did, i changed my mind not to build links. nothing to worry

(Note: I did not ask him if i could give my own content or videos, images to post nor did i ask him if i can blast with links, but i think he would be alright with the content part)
The PA was high. 30 average.