I have now purchased this oven twice, each time having to return it to the store..... it works great for a week or two, but then it begins to have issues. Both times, the fan located on the right side panel of the oven, has issues. It is very quiet when new, but give it a couple of weeks and it starts making an obnoxiously loud humming sound.  Both ovens of this same model have had the exact same problem. 

I love the functionality of this oven but this model clearly has issues with durability. 

I am considering trying again for a 3rd time... but may just have to go with a different brand. 

Overall, very dossappointed