2015 Pinnacle 38FLSA owners checking in here - just finished our 2nd weekend in our new 5th wheel.
We have some minor issues out of the gate - Zero fit and finish problems! - Everything is tight, and well crafted - IMO: best Cabinets in the industry, period.
Our issues so far have been functionality related - the LEd lamp over the Kitchen Table will not turn off, it turned on once, and has been burning with a cool led luminescence ever since day one...
We got the Reverse camera option - (Garmin based) - I'm a total nerd, work in IT and I've just determined it's either not installed correctly, or is not working. It never comes on - been through the manual 3 times now, not a HUGE deal, but not a little one either - got that option because this thing is 42 feet long and they do not make towing mirrors that are 6 feet (laughing).
It's heavy - better bring a 1-Ton or better. I have a 2015 Sierra 3500 CCSB with a B&W 20K companion slider - Our truck is a Single rear wheel and tugs this monster just fine.
The only major issue we have is - one or both of the Grey/Black valves are not water tight - I get some backup on the outer cap - it's not REAL nasty, but it smells of Urin and coffee....We will be taking her in for this issue, so I have to tug it back to the Dealership (~80mi).
the things that we just love far outweigh the little issues so far - At least in the 38FLSA the kitchen area is nice, the DW loves working in the triangle, says it's better than our house. the Suburban 12Gal Water heater is amazing also, works great, and if you need super duper fast recovery, use both LP and the Electric - WOW - about 15 min recovery, seriously nice.
2 fold out couches are 71 3/4 by 77 - Thats king sized or REAL close (72X78 RV king) - we fold them both out, grab up some pillows and lay out for movie night on the 60 inch bad boy.
The Fridge (samsung residential) is huge, and the Ice maker works to keep 6 adults in tasty beverages for an entire afternoon/evening.
Bathroom/Shower - Hey, ahem, 2 people fit in the shower.

- 'Nuff said.
3rd Grey tank - yes - this unit has a 3rd grey tank with a drain valve just for a washer/dryer combo. - nice.
Onan 5500W Genset - WOW - this thing is quiet and runs pretty good, I put a 5gal test run in it and got just over 20 hours before it went low fuel - not running AC, did run furnace for 8 of those 20 hours. I'd say 30-40% load
Auto level system - Read the instructions inside the propane cubby door, and be amazed...I was. After a couple of years of manually leveling our 38 foot Class A (It's old but trusty! 454BB Chevy P30 chassis) - I never knew... this is a must have option.
4 steps - I'm not sure if you know this our not, but 4 steps = easy up and easy out. we have some older friends (upper 70's), and they have no issues in or out.
Overall - We feel great about this choice - Oh and it holds heat/cold like it should, over the 38F nights this last weekend we set Furnace on 68F and it stayed 68F in the whole unit - the living room was chilly (one vent up there) but using the fireplace/heater made it perfect, if not a little warm upstairs.