I'd like to offer a perspective here.
First, I have not yet seen the MLD-28 and I'm not selling them at this point, so I don't have a dog in this fight.
But I CAN tell you about the many many other engines that I don't sell. I don't sell them because either they have caused problems for me in the past (3w and Evolution/MVVS) or I can tell from my testing that they will be a problem. I have tested many engines, only a few ran well enough to tempt me to sell them, and of those the only ones that proved trouble free are DA engines and the 3mm TOC-53.
There is always somebody who will make something cheaper. The trick is to find something that is inexpensive while not being cheap. If you go to the field and have to fiddle around instead of flying it was no bargain. I'd much rather pay $300 and be able to fly reliably than $200 and lose flying opportunities because of some quality problem. And if an engine doesn't run well enough to have fun, or shakes your plane to pieces or dead sticks and damages your plane, that engine was worse then no engine at all.
And if you have to throw it away after a few months because something fell of or broke and you can't get parts, what kind of bargain was that? Of course a lot of people only build a plane to look at it, fly it a few times then get bored or frustrated. IN this case the cheapies are a good deal.
All these ideas are from experience. I know that younger people think they are doing things for the first time, but I've been there, done that, and I have boxes of junky engines with 5 minutes run time to prove it.
I will be testing this engine soon, Steve told me he's sending me one. If I start selling it you know I'm satisfied. I set the bar pretty high.
Wild Hare Hobbies, Inc.