You may have heard of Jonas before - he's created ALOT of awesome Quake levels (Sadlark series), and for Quake2 he's already done a two-map unit. Unfortunately, because it was so good, it just left me craving for more because it was too short! Premonition Of Angron is right on the target - spanning four great levels which will keep you busy for a long time. The design and architecture is perfect, and with a very non-linear layout it was a very professional set of levels. The theme goes from your usual base, to coffins and a great palace that looked even nicer than ID's work.
The gameplay was awesome too, although most of the big guns you won't get if you aren't the type who hunt around for secrets (dammit that rocket launcher would have come in handy if I found it!). The last level was especially tricky, with you having to defeat a dozen Commanders and then go kill Makron while a bunch of Medics start re-spawning everything in the background! I especially enjoyed running around the level trying to kill those Medics before they brought anyone back (of which, apart from a puny soldier, they failed to do). There was plenty of health to get you through, and enough ammunition too. By the end of it I had so many slugs saved that I could do almost the whole last level with just them (and a few grenades). These levels were very fun and even better was the superb design, which make Premonition Of Angron perhaps the best set of levels released for Quake2.