I haven't dealt with that particular company. I bought my mini gooseneck from Wrangler, and my mini bumper pull second hand (link to see them).
When I was working on what I wanted in my mini gooseneck trailer, I pretty much got "everything" I could ever think of wanting as I hope this will be my trailer for many years to come. I did not want to outgrow it.
The options / features that I really like in it are the individual dividers that make 5 mini standing stalls, the drop down windows, loading ramp, the wall between the horse part and the matted dressing room area "swings" so 2 more horses can ride in there, lots of tie loops on the outside, and exterior convenience lights.