I note there are another 10 tracks in the Tropical pack - I've not got a use for that pack yet, but based on the first two packs I'd hazard a guess that the music is good.
The only pack arteria-gaming have released that featured some dodgy tunes was their RPG/fantasy music pack #1. That had three tunes that erked me. Every other tune (and pack) arteria-gaming have released has been on the level of average to good (sci fi tracks are very good). Certainly worth the bang for bucks ratio.