it seems quite alright.
Real great reviews from the download.com team. 4 stars.
It is said that ram usage is reduced.
From cnet.com
This isn't the most feature-packed Windows-optimization utility,
nor the most effective, but we found it one of the easiest to
control. Advanced WindowsCare's simple interface offers two main
options: Repair and Repair And Optimize. The former fixes Registry
entries and cleans out your operating system. The latter does the
same thing and tweaks Windows for maximum performance.
If you run into trouble, the Restoration option can return your
system to its original configuration. The Advanced menu provides
fine control over repairs and optimizations. On the downside, we
noticed only one improvement on our test PC: a reduced amount of
used RAM. Also, the program's brief descriptions of system problems
may not satisfy seasoned users. And although the latest version of
the app includes a help file, we wouldn't call it extensive.
Nevertheless, if your system is running sluggishly and you're
considering reinstalling Windows, it wouldn't hurt to try this
freeware package first.
++
2 opinions gave it great reviews ect.
http://www.download.com/Advanced-WindowsCare-Personal/3000-2086_4-10407614.html
Although i must caution, it is still in beta, thus, bugs are
still common.<!-- end download editors review -->