Is disk fragmentation a serious problem for you? I use SSDs for most of my drives, and let the Microsoft defragger do its thing once in a while, and leave it at that. Doesn't seem to bother me none.
"The key benefit to SSDs is that they have virtually no seek time. Reading adjacent blocks of data is no faster than reading blocks that are spread out over the drive. Fragmentation does not affect SSD drive speed.
(...) SSD drives physically wear out as you write to them. Defragmentation software moves around all the files on your drive. Thus, defragmenting an SSD reduces its life span without giving you any benefits."
I don't quite remember what the issue was, but there was a good anandtech article about it: http://www.anandtech.com/show/2738/8
Fairly certain modern SSDs are not affected, in any case.
So you claim to see improvement from something turned off by the OS? How?
(And not only was this was before the release of Windows 7, it actually came with some version of Xandros installed...)
When you're defragmenting, all you're doing is forcing the drive to write a lot, which itself essentially is a crazy way to fix it without TRIM command, but it works. On the other hand, you're doing a lot more write cycles than what TRIM or garbage collection would normally do.