I went through the exact same thoughts before buying my Keystone Hideout. The Hideout line is even cheaper than the Sprinter so I was scared to say the least. Of the 5 RVs I've owned over the last 20 years this one has been by the far the best as far as things going wrong. In over a year I have literally had no problems. I realize I'm in the minority as I read all the same horror stories you likely have.
In the end every manufacturer has good units and ones full of problems. RVs at any price point are a roll of the dice.
As for the finishes, RVs seem to be kind of like cars. Modern day even the lowest level car comes with A/C, power steering and windows, backup camera, etc. Items that years ago were totally just luxury models.
My Hideout has porcelain toilets, decent fixtures, enough furniture and things like that. I mainly ended up with the Hideout because of the floor plan. I gladly would have paid more for higher quality but so far it's worked out great. The thing well may fall apart within 5 years but at least for now it's great.
