I just installed it and found it very buggy and slow, also the fact it's a seperate application with its own window that somehow attaches to iTunes makes it very difficult to manage the window properly.

Beachballs constantly and eventually loses connection with the tune-up servers.

They were kind enough to provide an uninstaller (since they install frameworks in /Library/Frameworks AND they also install a bunch of UNIX libraries in /usr/local) -- although I found the uninstaller by accident while tracking down my Preferences.

It's in ~/Library/Logs and offers to uninstall everything including your preferences, which is nice.

Patrix.

Where's the Chat feature?

I agree with patrix.

Also, it generates genres which do not match the defaults used by iTunes, meaning that after it is finished one must still edit the information for these tracks.

I'll be deleting this app from my system until it hits 2.0.

Gabe Adiv here, CEO of TuneUp.

First off, thank you to MacNN for covering TuneUp.

Also wanted to respond to a couple of your comments:

We tested TuneUp for Macs for months prior to releasing it and improving performance was and continues to be a big priority for us. Such being said, what we’re finding is that while a handful of users are having issues with speed and performance, the majority aren’t. Really want to help make TuneUp work for you – feel free to contact me directly at gabeA AT tuneupmedia DOT com and we can figure out how to fix the some of the bugs that you guys have encountered.

In terms of the genres not matching iTunes, we use Gracenotes MusicID technology to provide metadata to our users. We are working on allowing users to choose which fields they want TuneUp to fill in, and which ones they’d rather leave as is. This should alleviate a lot of the concerns about inconsistency and be ready very soon.

Thanks for all of the great feedback – this sort of stuff (the good and the bad) are critical to developing a better product.

sorry, but I have to confirm the other commenters.
1) this is clearly not an iTunes "plug-in". At most, an "add-on" would be more descriptive
2) i'm generally stuck with either a "contacting TuneUp Server message, or TuneUp server not available error message
3) when the server has been available and I try to drop even a single music file in, I just get stuck with the spinning beachball of death..... Haven't gotten a single lookup to work yet

I have 'tuned up' about 2000 songs so far and the application has worked without any issues. No beach balls, no 'missed' songs, etc.