OH YES Crockpots are SOO worth it!!! EVEN MORE SO if you go to yard sales, thrift shops, etc and get them for under $5 bucks!!
(I actually like the older ones without the timers better, they dont cook as hot and overcook your foods as much as the older more traditional ones do)
Have to add this, whatever you do, make sure you get one with a removable crock! The electric outer part cannot be immersed in water, which makes it a pain when you have a dirty crockpot to clean.
I (family of 3) have two - one a "standard" size (4 qt??) round, deeper than it is wide. And a 2nd, my most used one, which is an oval one (6 qt I believe). Both are Rival crockpots, with the standard off, low, high settings (we didn't want the one with the timer & warm settings, as we've heard not so positive things)
Every week, at least, I use my crockpot. On Sundays I put in a roast (our store often has buy one get one free sales, so I stock up.) Brown it first, then put it in the crockpot, salt & pepper it. Let it cook, better on low for 6-8 hours but if you only have 4-5 hrs, on high. My husband prefers nothing else added. By the time you're done, you have a lot of broth that you can make yummo gravy with!
Sometimes I shred (especially the leftovers since with just the 2 of us and a little kid, we have plenty!) into shredded beef for bbq sandwiches or enchiladas or ... Sometimes I cube the leftover roast into pot pies or...
Usually my husband will take a couple slices and make a RB sandwich. Or fix it with other leftovers for a hot "dinner" lunch.
My young sis in law served us this super yummy and easy meal - her husband actually fixed this one! Cook pork chops in the crockpot with spaghetti sauce over it & onion slices, then put onto plates and serve with sauce spooned over, and sliced/shredded cheese melted over the top. YUM.
I've never actually paid attention to the amount of actual prep/cooking time but whatever I can do BEFORE the late afternoon is GREAT! The hour(s) right before dinner are the most hectic with the most amount of kids being clingy/fussy/needy/clamoring for your attention, not to mention the usual needing to get homework done or other out of home errands that fall in that time window. It is SO nice to come home and have dinner ready, just make a side and put it on the table. And, I usually have meat cooked for several more meals later in the week.
Another crock recipe that is easy (really very little prep!) is put chicken breasts into crock, add can of green chilies and can of cream of mushroom (how much is up to you) and let it cook. Good served with rice.
Or this: Chicken boobs with packet of ranch dressing mix sprinkled over.
Really, there are SO MANY things you can do!