We first purchase a 2010 2350 with a dinette and no slide and at Stuarts recommendation, they replaced the barrel chair with another auto seat so we had a seat to secure a baby seat for our granddaughter. We decided after several months the corner bed was not for us. So, after talking to Stuart about a 2551 we found it was not long enough for our required third auto seat behind the passenger seat for our granddaughter. Stuart and Kermit came up with lengthening the body by one foot to make room for the extra seat, thereby evolving a 2551 into a 2552. The logistics of this design change is quite involved. All of your wire harnesses and water lines are all changed by that extra length and not inconsequential, the roof, walls, floor and Ford frame have to be made longer. So, I am very impressed that a manufacturer would go to this extent for a customer and my hat is off to PC for their customer service.
We have now been on a trip of 4000 miles. These are my observations of the 2552's (slide and couch) performance. The unit is much smoother riding which is representative of a longer wheel base and because it is smoother it is also quieter inside. Some of the noise inside while traveling in the 2350 we found was created by the table leg on the dinette. To curtail that noise we put the table in the bed position and put the cushions on it.
I find the engine/transmission does not shift, or hunt for the proper gear, as often as the 2350 did. I attribute this to the rear axle gear of 4.56 in the 2552 vs. 4.10 in the 2350 even though the 2552 is heavier. The third auto seat is also handy for the passenger if you want to sit out of the sun and you can use the passenger seat for a foot rest.
There is a negative as a result of the longer wheel base. Your turning radius increases, so you need to plan where you are going to park or get gas. You must allow for the extra length when turning and not do what I saw a Class A driver do. He turned too early and planted a 4" steel post in the middle of the side of his unit.
We found gas mileage to be very similar to the 2350, maybe one mile per gallon difference. Driving around 65 on the Interstates and some town travel gave us the average of 8.5 MPG. We did get 10.5 while drafting through Los Angeles traffic. I say drafting because you are always drafting in L.A. Leave a space and someone will fill it. We had a low of 7.5 going up the Columbia River in a strong head wind.
We did bite the bullet and replace the Eclipse/Tom-Tom system with a Kenwood radio with XM and Garmin GPS. Costly, but well worth it. With the recommendation of the Kenwood installer, we will sell the Eclipse system on E-Bay.
I replaced the fixed heater vent in the bathroom with an adjustable one. I find I need to use a clothespin to keep it where I want it. When it heats up it blows closed, but it does force more heat to the front. I also replaced the shower levers with knobs. I kept hitting the levers and going to either extreme heat or cold. Knobs work great and purchased them at Lowes.
So far, the only problem we have is with a water leak in the rear outside compartment and we are working Kermit to locate the problem. Only two items I will add at this time will be a front steering stabilizer and a rear trac-bar. With the fresh water tank mounted over the rear axle you do not get the pendulum affect as you do with the water being all the way in the rear as on the 2350, but with the transfer to the holding tanks you still need some help, thereby the trac-bar. Do not see the need for heavier anti-sway bars at this time.
I use my ladder to check the roof and found it is really handy to keep the back-up camera clean, one rainstorm and it needs cleaning.
Love the slide-out, so much more room. Would not be without it. Makes a nice area for the Granddaughter to play in when we take a break and room for adults to stretch out and relax.
Bob