I have had nothing but trouble out of my "premium" dentures. I opted to get MDI implants which helped with the lower denture.
I had to go to an office in Amarillo to get them and have since lost 2 of the o-rings. I called our local office to see if i could get them to repair them, was told I have to go back to the original office because they might use a different size, so to make a long story short. They offered to make a new set of dentures that I would have to pay for again...the round trip would be 8 hrs on the road, but the local office is 20 miles from my home...WTF.
don't go there, ever!