The weight and price are right (I got it used for $275). I haven't used it enough on stage to really have formed an opinion. One thing to watch out for is that the power ratings that are published are a bit misleading. They are generally at 1khz at a fairly high THD, so when factoring in full bandwidth at a reasonable distortion, the power output comes out much lower. However, the IPR 1600 and 3000 are both bridgeable, so when doing that, you can get a reasonable amount of power. It's definitely not the same amount of oomph as my QSC CX1202v, but it's about one third the weight.
In general, I miss the old days when amp manufacturers gave us specs that meant something. It makes me a little skeptical of the new generation of very light class D amplification, because most often, the power rating is at 1khz, without reference to the type of rating (RMS, peak, etc.). I compared it to the Showman when doing the soundcheck for this gig and the Showman seemed equally loud and it's only 85 watts RMS. So, my take is that the IPR 3000 is probably equivalent per channel to something like the Eden WXT500, maybe slightly more, which would be unnoticeable in the real world. So, it's like carting around a couple of the WXT500 power sections.
Peavey does make some higher power IPR amps, but they are not quite as light and are significantly pricier. There is a Crest version as well, which has a few more bells and whistles (like a switchable bridge mode instead of having to do a cable dance) and a heavier duty chassis.