I'm on my second year with the exact same model trailer. The bunk ladders are pretty universal - You can pick one up at Camping World or online. The standard metal ones can be cut to size.
Overall, I love the trailer's layout. I wish the bedroom had a bit more room but the 1/2 bath more than makes up for it.
I get zero flow of heat to the bedroom but the A/C is super strong (different ducting). It's fine for my usage since my wife can't stand the noise of the furnace so we are usually using space heaters anyway. Or, camping in the summer with no need for heat.
I'm always learning new things about my trailer. Just recently I concluded that the outdoor kitchen sink feeds into the rear black tank. Also, the front bathroom sink feeds into the front black tank. This makes it super easy to put water in the black tanks, when needed.
I recently had the bolts on the tubing that runs the passenger side landing gear fail. It turns out they are a designed weak point so as to not do damage to other parts. I over ran my gear at the lower end and the bolts snapped rather than the fuse cutting out. It had me stumped for a bit but once I know how to change them it's literally a 5 minute job. You might familiarize yourself with that and carry some spare bolts so you don't get stranded.
I haven't had too many things go wrong but I'm always somewhat worried since I know these things are cheaply made. And the Hideout line is the cheap end of cheap trailers
I/we just fell in love with the floor plan. That kid's bunk room is just amazing.
I ended up taking out the worthless uncomfortable couch in favor of a Euro recliner and ottoman. Now, on rainy days I have a real place to sit rather than the couch that feels like I'm sitting on a window ledge
Be careful, the back end of this trailer us REALLY low. I ripped a jack off once but to be fair I was up on a logging road I probably shouldn't have been on. I also bent one once pulling out of a gas station that didn't seem to have too much slope. I'm probably going to get some casters at some point. Also, I relocated the jacks a bit forward and did it in such a manner that they can be removed in a couple minutes rather than being welded in place. The trick is taking them off when needed. I never really know when I'm going to encounter a low driveway. I suppose I could just take them off every time out but I'm too lazy. Also, replacements are cheap - +/- $30 at Harbor Freight in you need one.
My co-ax cable connections were all loose behind the plates and I got all kinds of static until I tightened them.
I got leakage behind the city water connection due to a hand tight fitting that my kids could have gotten tighter. You have to remove the screws in the vertical carpeted panel towards the back of the trailer from the storage area under the bedroom. A friend with another Keystone had the exact same problem so this is probably worth a look - it just takes a couple minutes.
I often get a skunky smell in the outdoor kitchen. After learning that the sink drain connects to the black tank I'm thinking that could be part of it. But, the P-trap should stop all the sewer gas so who knows?
Overall, I love the trailer. I do wish it were a bit smaller but that's not the trailer's fault. I just have a lot of kids. I labored long and hard between a TT and a 5th and am very happy with my decision. It's just a lot of trailer to store, drive around, fit into campgrounds and pay for.