Well it's been about 6 months since I upgraded my MBP.
2010 MBP 15" i7, 4GB RAM
2 x 500gb 7200rpm / 4GB NAND SSD hybrid drives. (one installed in the super bay with adapter).
1 x External samsung Superdrive when required.
This gives me:
1TB of usable disk space, based on the 2 drives running as a RAID 0 striped array, with the hardware supporting 8GB of NAND flash, and the rest normal disk.
The USB superdrive is plug and play when I require it, so far about twice.
A super fast 1TB disk that is very cost effective when compare to pure SSD. No problems to report other than a slightly shortened battery life from 7 hours to about 4-5 depending on usage. Striped disks are more vunrable to data loss as I have two phisical disks compared to two, but I backup with timemachine to NAS regularly. Total cost was about $300AUD. I would recommend this solution to anyone wanting 1TB+ of disk space in a MBP that can support two disks. It's very very fast, and the throughput (transfer rate) is famtastic. One of the hybrid drives alone is very good, but for the price pure SSD can't touch it.
The upgrade preocess was very easy, and did not even require rebuilding from scratch, all I did was take the origional HDD out, install the 2 new ones, then boot from the old HDD via USB, Configure the 2 new disks as an array with the disk untility, then using a clone tool like CCC copy the old drive to new drives. reboot, done.
If your looking to get more speed from your MBP and are consitering SSD, then this is worth consideration.