Sorry, I've yet to join the SSD club.

However, I used both PerfectDisk and Diskeeper. I'd recommend trying the trial version of Diskeeper with Hyperfast

Personally, I've stopped using PerfectDisk and use Diskeeper instead. I like how it operates in the background and overtime moves files toward the back of the disk.

PerfectDisk, OTOH, is much better for single-pass defragmentation and does background defragmentation strictly on a schedule.

Both have features to help prevent fragmentation. So, it's a question of whether which method of background defragmentation you prefer.