I bought a few of these effects years back (like 2002) and still use them today. They aren't the hottest thing on the block, but they are good effects that get the job done - when the job fits.
They are clean, efficient, with great interfaces that provide excellent feedback
The multiband compressor is great for surgical work - attacking a very specific frequency range.
The reverb is a nice addition to any toolbox. I often just use the early reflections in combination with other 'verbs.
I also have the compressor and use it sometimes.
Cakewalk bought these from an indie developer back in 2004 - they rebranded them and, as far as I know, have done nothing with them since except drop the price. The full suite is now priced at $99. I was looking into them for a friend and saw the Cakewalk has a coupon code for 26.2% off any purchase until 4/30/12
Sonitus:fx Suite Download
If you have $73.06 to put toward some nice tools for the toolbox, I'd recommend them.