We've had one of these with various add ons for about a year and my three year old now likes climbing right to the top - never having fallen off yet, and her 7 year old best friend really likes it too. The good thing about it is you can put it at half hight for smaller ones, but it can last them a lot longer when assembled to full height.
It's really sturdy and doesn't seem to've weathered. It is quite tall, about 2ms, being above our back fencing but is cheaper than a lot of other climbing toys and multi purpose being a climber, a tower or a building to hide under in various games. It's good for a small agrden I think in a way too and takes up less room than a swing or slide although it will take seperate attachments as it is a modular system that can be added to to create a full activity play set if required.
The only drawback is really that when standing in the top it takes some skill to manouvere yourself around without knocking yourself, but then again kids like all that under and over business so who am I to point that out. Quality, reliable, well constructed and regarded manufacturer, sold in most major shops. No safety concerns.