My other half wants me to get a rice cooker. I seriously have doubts about it. It's easy enough to use a pot. I boil the water, rice and salt in, bring back to boil, back down to simmer for 5 mins (this is for long grain white rice), then turn off the fire , cover and leave for 15 mins.
Cooking time can vary so check it as you go, but don't open the pot too often. You'll lose the heat and steam. If it's too dry, just add a sploosh more water, mix it through, back on a low heat for a couple of minutes. If it's too wet, back onto heat with lid off until it's right for you.