Sawo ALEKO Rocks Heater

Customers report that the product quality is good, with reviewers noting that the rocks are excellent for sauna stoves and heaters. The performance is also positively reviewed, with users stating the rocks work great and are perfect for sauna use. However, opinions are mixed regarding the size of the rocks, as some customers found them to be too large or containing too many small slivers, while others found them to work well despite their size.