Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not sufficiently durable for exercise

I have owned two of this watch model and in both cases, the strap separated from the watch within a couple of months of use. The strap is made of rubber and the screws connecting it to the watch actually go through the rubber, as if screws through soft rubber would actually be expected to hold - this is particularly silly given that it's supposed to be watch to be used for exercise, where rough conditions are expected!! I would not have a huge problem with this strap issue except for the fact that I've trolled the internet and I cannot find replacement straps for sale. If there are no straps for sale, the watch is essentially done as soon as its strap breaks. In sum, this watch has got great functionally and an attractive design, but if you decide to buy it, in my opinion you should prepare yourself to essentially pay a high price for what amounts to a disposable product.