My own experience
In my own dealings with Uwe, I found him to be a very, very nice person. I wish him and his agency nothing but the best. That being said, I am offering my own experience with him, below, for you to mull over. Take away from it what you will.
Uwe requested the full of my fantasy, after a reader read the partial and loved the prologue but hated the first three chapters because they were too slow. Uwe sent the full to the same reader. I received a response in roughly a month. Excellent RT.
I was a bit dismayed that the reader professed "great experience" in the SF/F genre and that he was "well read," yet he'd never before seen the word "anathema." In addition, the reader felt that I overused "anathema" (a total of three times in a 104,000 word manuscript--once at the beginning, once about 1/3 of the way in , and once toward the end, and in two of the three times the usage was in the context of religion) and wanted me to use a synonym. (If he would have opened a dictionary, he would have seen that my usage was, in fact, correct.)
Another sticking point for me was that this reader also wanted me to "inflate" my manuscript -- I'm a first-time author -- because clocking in at 384 pages -- yes, pages -- was pretty slim for a fantasy novel. I was greatly disturbed that the reader (A) went by page count instead of word count -- like I said above, my WC was 104,000; if I had printed the story in 12-point Courier with 1.25" margins, I could have had 550 pages; and (B) wanted me to "inflate" the story. My own research shows that fat books and first-time authors don't mix, period, and that having a manuscript at 104,000 words for a fantasy is just right.
Last, Uwe forwared the reader's feedback to me, but he didn't offer his own opinion on it, let alone offer direction other than a somewhat cryptic "promising"-- was this an acceptance? A rejection? A note to revise? I don't know.
I thanked Uwe for forwarding me the feedback. I did appreciate it; there were a few nuggets in there. But ultimately, I did not ask Uwe what the next steps were, and I moved on. In addition, I chose not to raise the points I'm making here with Uwe himself; I figured he trusted his reader, and that was good enough for me. Perhaps I made a huge mistake. Perhaps not. Simply put, I did not agree with what the reader said, and I let it go at that.
Again, I want to reiterate that I highly respect Uwe, and I hope he makes the first of many sales to come. I know some of his clients, and I wish them the best, as well as Uwe.