I had a 510XL which is a 520XL minus the RF gain. I thought it was a pretty solid little radio for the price. I got it for $20 a few years ago on ebay, used. I got it for the wife to put in her car. I found a new in box Midland 1001z for $20 and thought it was a steal. I took the 510XL out and gave it to a buddy. I installed the Midland and began my regret. What a pile of turd. The Midland is very cheap. Audio quality goes down hill fast. Transmit range was equal to any other FFC approved CB. It sounds ok sometimes, then after a few key ups it becomes distorted and scratchy. It was to the point it was hard to understand her. I eventually took it out and put my old Galaxy 929 in and problem solved. I tried to sell the Midland, and to no surprise, no one would even pay the shipping if I gave it away. I was able to pawn it off on my step father to put in his old plow truck and said good riddance.
You may not have all the bells and whistles in that little Uniden, but they build a pretty good radio. And DTB does a heck of a tune so it should sound good and last a while too. You made a good choice choosing the Uniden over the Midland.