I've found the Lutron Caseta line perfect so far. I won't buy anything that requires external servers etc (like Nest). But Lutron only makes a limited range of devices.
Pretty good solution.
The only downside is that they aren't available in the UK, but that's not uncommon for non-mainstream smart home products.
Ex. I used a lutron caseta smart switch with and a pico remote to add three way switching for my kitchen and dining room. Where they used to only have one inconveniently located switch.