Does anyone use this?  It's significantly cheaper than, say, Ozone 7...
 
http://www.har-bal.com/

I heard that it's good, but I also seem to remember that there were some people who were spoken to pretty disrespectfully by their rep. I could be wrong, but I'm pretty sure I'm remembering correctly.

It is indeed cheaper than Ozone, but is by no means a replacement for it. If those are the two products you're flipping a coin over, forget Har-Bal and spring for the real thing. If Ozone's cost is prohibitive, there are several less-expensive alternatives.
 
And yes, Leadfoot is remembering correctly.

What are the less-expensive options?  Bad reps are a big red flag for me!  Any juicy stories?  
 
I'm not really flipping between products, just thinking about what I could possibly need and why.  As far as plugins I only have what came with Sonar - and I'm getting decent results.  But curious to see if there are tools out there that would help up the results a little bit.  (and I understand that it's probably more about practice and ear training than any plug-in...)  I read somewhere that Har-Bal was great for learning - so that piqued my interest.
 
I was also looking at getting a couple of Waves Plug-ins.  I downloaded the Ozone demo and wasn't blown away...  
 
The only problem I'm finding with my Mastered Projects is that it lacks a "smoothness" quality...  That's the best way I can describe it...  
 
I'm still learning!

Har-Bal is an equalizer and limiter only. Not a complete mastering environment like Ozone.
Har-Bal would be used as a part of your mastering sequence. 
The Har-Bal equalizer is unique in the way it operates. It gives you the average frequency response of your entire song displayed on the graph. You are then able to apply changes to EQ and get immediate visual feedback from the graph. When you are done adjusting the EQ you render the file. Note: Har-Bal is a stand-alone application only, not a plug-in.
 
I own and use Har-Bal but only use it on the more difficult jobs. It is a tool. It does what it is supposed to do.  
FabFilter's Pro Q-2 has a similar feature named "Spectrum Grab". FabFilter Pro Q-2 displays the accumulated "peak" EQ while Har-Bal displays the accumulated "average" EQ.

What about Voxengo vs Waves vs Ozone vs Har-Bal?  
 

I'm surprised the website still works.  I hadn't heard any news from them for so long, that quite honestly, I thought they had closed up shop.

For those of us still at the beginning of our Sonar journey, Nectar and Ozone give us presets to get us in the ballpark, and they deal with the heavy lifting. I pick a preset and fine tune....I wouldn't have a clue without them...

I've used HarBal a lot in the past, mainly to make backing tracks I used in live situations, be more consistent to each other, both in volume and EQ.  That task was a tad tough at times with the variety of music I was playing, and using HarBal got them pretty well manageable and I wasn't just totally relying on the sound guy to keep my bass freqs in tact and volumes all over the place.
As far as the juicy...HarBal has been around for quite awhile and when it first hit the market, there where SO MANY nay-sayers, dissing the product.  It's a very "visual" product, as you can see pretty much what is going on, but all the "golden ears" were saying you don't master with your eyes.  Of course all the "minor league" [home] mastering guys that professed to make a living at it, totally slammed it, for obvious and some not so obvious reasons.  There was also the idea with Harbal's inventor that you'd a reference track as a base, and then match up your [similar] music to it.  Of course that idea was totally thrown to the dawgs.
Then..."Mr Harbal" made a couple of comments as a 'newbie' on the forums, and totally was piled on.  No need to research.  Imagine one of your more "vocal" forums and someone saying ProTools is for fools, and defending that concept.
If used LIGHTLY, the program is great and I believe actually works well. It has a unique EQ and does the job.  It is a very visual learning experience and gives you the potential to see what's happening in HarBal...and then fix it in a 'better' program....as many have suggested.  For home-brew mastering on the quick, it's fine but I think being overtaken by more full featured products.  Heck...I don't see going out of SPlat in the near future for my measley home creations...
So...that's all I have to say about that!!!

mikedocy
Har-Bal is an equalizer and limiter only. Not a complete mastering environment like Ozone.
Har-Bal would be used as a part of your mastering sequence. 
The Har-Bal equalizer is unique in the way it operates. It gives you the average frequency response of your entire song displayed on the graph. You are then able to apply changes to EQ and get immediate visual feedback from the graph. When you are done adjusting the EQ you render the file. Note: Har-Bal is a stand-alone application only, not a plug-in.
 
I own and use Har-Bal but only use it on the more difficult jobs. It is a tool. It does what it is supposed to do.  
FabFilter's Pro Q-2 has a similar feature named "Spectrum Grab". FabFilter Pro Q-2 displays the accumulated "peak" EQ while Har-Bal displays the accumulated "average" EQ.

FabFilter Pro Q-2 seems pretty awesome!!