I have had one for several years (received as a gift) and use it all the time for paper-piecing. Seems that the small head works best for this. Never had any problems with it.
But I have another (very old) small iron I use for small projects.
If I decided to buy another one, I'd buy the one that has the interchangable heads so it can have more uses.
Would I buy another one? Yes. I am happy with this product.