Licensing
Simple terms. Make music with the sounds, just don't resell them as sounds.
Royalty-free in your music
Use the sounds in commercial and non-commercial releases, films, games and client work. No extra fees, no reporting.
No redistribution
You may not resell, share or redistribute the raw audio files, including as part of another sound pack or preset library.
Free packs, same terms
Free packs carry the same licence as paid ones. Nothing is watermarked or time-limited.
Formats
Everything downloads as 24-bit mono WAV at 44.1 kHz, numbered and ready to drop into any DAW.