Continue using it to see. If it isn't what you want within the 30 days the retailer normally allows for return, call retailer as soon as you realize this to confirm return policy then if necessary take it back and choose another model.
After that you have the one year manufacturer's warranty to test out that machine to make sure you don't have a lemon (very rare - only seen it once) and if so have it replaced and the replacement also shaken out before the warranty expires.
Let us know how it goes.