Yes! Makes the laptop a lot more responsive than the spinning rust that came before it.
Also a consideration is reliability - SSD has no moving parts compared to HDD; given the average laptop is moved about quite a lot this is also an important consideration
I actually broke one of my previous laptops due to the bad response time and the constant hanging whenever I opened my CRM management software and outlook at the same time. Got a brand new laptop with new ram and was still having the same issue.
I put in a SSD drive into it and have not looked back since.
Yes. I have a rather old Dell XPS 17" (I7, 1080p), which has two drive bays and four memory slots. Memory is up to 24G. There is a 250GB SSD as primary drive - which runs my Linux core programs, my e-mail directory and the MySQL data area, and a 1TB spinning at 7200rpm with all the rest of my stuff.
When compiling (I run Gentoo), I run a RAM TMPFS -so compile in RAM. Its pretty quick.
My work machine would be perfect if I could do this. Problem is, my Group IT, would have me flayed and barbecued if I did it. Have contemplated it many a hour of most days. Sadly I just don't think it'd be worth it