Xfi Pods slowing internet down

So I've been dealing with dead spots through out my house and decided to invest in a pack of 6 pods to distribute through my 3 story 5 bedroom house. After getting them installed and all connected and online my speeds have drastically dropped. I'm seeing on average about 30Mbs which is unacceptable as I work from home and I pay for premium speeds with speed boost. The only devices in my house not affected are the ones that are hardlined. The dead spots I had problems with still experiance intermittent connectivity and the devices that used to work fine are now bottle necked. Not impressed especially considering the price, I had hoped that by purchasing vendor specific devices that I'd have a better experiance.. I was wrong.