I've noticed it even makes browsing the internet faster.
I also timed how long it took to restart: only 30 seconds! I don't have issues with slow software now either editing photos and even videos is a breeze. The boot time is ridiculous now, about 10 seconds compared to a minute and a half (I could go and get a cup of tea before). I bought the Western Digital Blue 3D NAND 2.5' SATA SSD, and it's been running happily in my MacBook Pro 2012 ever since. This stops static electricity from shorting out any vital components and wrecking your laptop. The process was simple and there are plenty of guides on how to do it online, but the big tip I recommend is using an anti-static sheet when doing the swap. I bought one and made a straight swap by unscrewing the bottom panel of the laptop and unclipping a few pieces. The benefit of running an SSD over an HDD is that there are no moving parts, and the speed benefits are enormous. I switched out the old hard disk drive, which runs on old metal, spinning discs, and popped in a brand new solid state drive. This is by far and away from the best upgrade I made to my MBP. Solid State Drives (SSDs) have no moving parts, and the read/write speeds are incredibly fast compared with old mechanical hard disk drives.