The 328M is a good floorplan if you want a short, maneuverable, light weight unit. I had a 2013 Voltage 3200 (very similar) toy hauler. I just picked up my new Momentum 328M on 8/5, so we are still loading it and learning, but I have been very happy with the purchase. The Voltage was constantly having issues, especially with the main slideout.
Since I have an older truck, I was also very happy to weigh it and found that it really did weigh what the sheet said it did - and it is over 2K lbs lighter than my Voltage was. With the GVWR the same on Momentum 328M and Voltage 3200, I have lots more safety factor for the tires, axles, etc. and will not be likely to overload it at all.
The storage space in the 328M is huge for its size. I more than tripled the storage capacity when compared to my Voltage 3200. I had boxes stacked in the garage to hold stuff that there was no place for in the Voltage - plenty of space in the Momentum. Everything has a place and there is plenty of left over space for extras or future stuff.
You can get to anything in the kitchen with the main slide in, as long as you can squeeze through the space between the slide and the TV. I am not a small guy, at 6'-5" and 230lbs, and I have no problem. But if you are on the wide side, it may not be your best choice. I think there is only about 14" of space to get through.
Ask any questions - I will be happy to relay what I know.
Just an FYI - my sis and bro-n-law were so impressed after I finished researching the 328M and purchased, they are in the process of purchasing their own 328M.
Hope you find the unit you are looking for!
Jeff