Awesome! I've been happy with my My Pet Chicken chicks- same experience- they come out of the box raring to go.
Do keep an eye out for pasty butt - it does happen no matter what you do. It can start with just a little dried bit of poop hanging onto the rear and build into a bigger problem. So- at the first sign, clean it off, the sooner you do it the easier it is. Check everyone at least twice a day - generally about 3-5 days in it becomes much less likely.
My favorite technique for clearing pasty-butt is to wear a long sleeved shirt with the cuffs loose enough that the chicks can hide their heads while they get the rather indignant butt rinse. i.e. pick them up with your non-dominant hand with your palm against their back, with their head facing into your sleeve on the underside of your rist, and use your fingers to support the legs. Then use a warm stream of water to clear the blockage with your dominant hand, trying to keep the chick as dry as possible ....
The key to happiness in drying is good quality toilet paper. Think of it like a hotel quality robe for chicks, and much softer on their delicate skin. Paper towels might seem OK butt (hahah) for the delicate posterior of a baby chick, quality toilet paper is much better. Once the toilet paper has dried them as much as possible, I use a hair dryer on the lowest setting to regain the fluffy look. Run the hair dryer until it's warm before using it on the chick.
Letting the chick "hide" under your cupped hand can help the entire process- they feel safe like they're under a momma hen.
The return to fluffy look is very important because a non fluffy butt shows off the constantly moving vent to curious siblings, who might then peck it because they can see it while the chick is damp or just ... unfluffy. Dry isn't the same as fluffy.
Congrats on your new additions!