I recently installed to BP5e series drives in my venerable 2008/9 MacBookPro, based in large part on the recommendations found here at Toms Hardware.
I'm provisionally satisfied with the upgrade.
Several factors entered into the decision: My existing internal drive was both nearing capacity with legacy data and old enough I was starting to worry about the longevity of the disk surface. I do a lot of disk I/O during my daily workflow as I serve the websites I develop to myself locally and local storage I/O rates was the last link in overall system performance I could improve. And I'm capable of doing my own research and support.
I replaced my internal 750GB Western Digital drive with a 480GB BP5e formatted with two partitions so I could dual OS boot the computer. I then replaced the optical drive with one 960GB BP5e in an OWC Data Doubler caddy to hold the work files.
I had to pay a lot of attention to partition alignment issues and had to install TrimEnabler to get the Mac OS to use TRIM on third party drives. These two issues dealt with, I feel I will get optimum performance and wear balancing over time. A given Boot Partition is about half full with 128GB of data on a 239GB partition, so the drive firmware can move files around as needs be.
I've got more free space left over on my work disk than I had in total, so there is plenty of room for new projects.
One of the disappointments is that the MBP uses a NVidia MCP79 SATA controller, which is notorious for issues. The best it can do is SATA II and I was willing to live with that on the principle that the next upgrade would be to the system itself. A 2012 MBP would buy me ~32GB ram, more processor cores and SATA III speed, so I'm basically setting up for that system when I can afford it.
However the work drive in the former optical bay ends up negotiating a link speed of SATA I, so I am running the drive there at 1/4 its capability. I have sent a note to MyDigitalSSD tech support asking them to work with Apple and arrange for that negotiation to end up at SATA II, but thus far no reply.
I am doing a poor-man's raid by keeping my zillions of website HTML, PHP, CSS and JS files on the external drive and the Database Server, Webserver and PHP language files on the boot drive, so both interfaces get used to deliver a web page.
Thus far, web page delivery, while not instantaneous, is much quicker overall and boot time is down to the order of one minute.
Ask me in a couple of years if going the low cost, low performance value drive was the right option.
To get the most out of these drives in the long run, you have to pay attention to proper partition alignment and TRIM enabling, particularly on Mac OS X.
The upgrade made sense to me and thus far has worked out.
Your milage may vary.