When the S215 came out I was initially in love with the boat, I thought it would be the perfect upgrade from my 2003 Chaparral 215 SSI. I drove down to the Miami boat show just to see that boat when it came out so I would have a goal to reach one day of buying one.
Upon climbing in, as said previous... it's a TINY boat. It might be 21ft feet long like my current boat, but it's cheating. The built in swim platform and bow roller count as the LOA, the S215 is actually a 17ft boat. The outside seating has about as much room as a Mazda Miata and the "cabin" is not for adults. Let's look at some pictures below. Keep in mind that Four Winns (and all boat manufacturers) use very short people so their vessels look larger.
If you pay close attention, the little kid in the back he's not putting his legs down because there quite honestly isn't enough room. The adults up front look comfortable but keep in mind she's probably 5'0" and he's 5'4"
Let's look at the inside:

The cabin has lowered seats because you can not sit in the V-berth. I'm 6'2 and I still could not sit in the seats. My girlfriend at the time was 5'5 and she was still rubbing her head on the roof. Want to lay down for a nap? Sure, if you keep the door open so your feet stick out. You can use the IPAD for reference which is 9" tall, the length of the inside cabin is only 5ft. The height in the front of the berth is only 2ft.

Let's look at the top view:

These seats are on sliding rails and are pushed forward, easily told because the steering wheel is even with the front of the drivers seat. I'm not sure about you, but the distance between the front of my seat and the wheel is about 8-12in which slides the seats into the rear seats. Again, this is what I saw in person also.
If you're trying to compare boat sizes here's a reference: A 2005 model Sundowner 205 is equal to a 2014 s235. A 2005 model Sundowner 225 is equal to a 2014 S265.