Agree with the quality comments. I’ve used some cheaper rental ones and they feel closer to a vinyl raft than a hard board.
I ended up buying a couple of the inflatable 10’-6” boards from Red Paddle Co about 6 years ago, now. They are fantastic versions and we’ve taken them with us on several flights to a variety of destinations. Also, since adding an adapter valve for a 12V compressor they are super easy to inflate. With just the hand pump, it’s definitely a big part of the workout since they function best with a decent amount of pressure in them compare to other boards and that takes some oomph, for sure.