My 15month old son loves this slide and we've kept it indoors only.  It is high enough for the slide to be functional and fun, but not too high to worry us.  He had an issue climbing up the ladder, but got the hang of it very quickly.  He also loves to sit in the loft area and play.  The only negatives I found were that the slide is very light weight so it is easy for him to move it from the ground due to our tile.  Any carpet would take care of this.  The second negative was that the ladder didn't have any real grip, but it was also not slick.  My son can easily go up with only socks on.  With all of this, I heartily recommend this product while you can still get it.