Have been using 2 systems with hardly any problems.
I use 4 tp-link plugs work well and natively with Alexa. You can connect and control any low-medium powered device.
They also have hubless light bulbs which are controlled the same way, but I have not tried those.
I have a Broadlink RM2 pro remote box (rf + ir) + cheap Etekcity plugs + rm plugin for android.
that is a cheap and interesting way to go, since it can control ac outlets, TV remote, Air Conditioner, etc. It works well, is cheap, but requires an Android Tablet or Phone as a "Bridge" for Alexa.