My 17-month old has no trouble getting up and down.  She loves being a part of what I'm doing in the kitchen (even if she's just playing in the sink while I cook dinner).  It's light enough that she can push it across the linoleum but it doesn't scoot or slip when she's up on it.

We are thinking of buying a shelf liner to put on the surface she stands on, as it becomes extremely slippery when wet.  I will probably only fold this up for storage a few times a year since stepping around it is easier than breaking out the allen wrench (which we taped to the bottom of the stool for easy access…but still). Dry erase board and chalkboard are low quality and basically worthless.  Shape cut outs are tempting to climb - we have a strict "feet on the floor" rule that she's pretty good about, but a sneakier climber will be on the counter in no time.

Definitely not an heirloom product, but I think it will last as long as I need it to.