Citywide Fashions review for Retail Barcode Labels

We are new to shopify and trying to use the retail label app slows down our process but is the only no charge app available. On 50% of the product entry we have to keep re instructing the system to create barcodes and then print the label. Not one day of product entry has gone by without the system failing and us having to repeat steps over and over again on the same product.