I love this system because its simple yet very effective at keeping track my business expenses which saves me time in having an excel spreadsheet all over town doing manual expense tracking when i could be using proFFITT Center instead!! Also they offer training courses if needed after purchase unlike other companies who expect their customers learn everything by themselves without any help from them. They also provide excellent customer service. ! Nothing really but some minor issues here & there regarding bugs maybe? But nothing too serious though not something worth ranting about either :) Just keep up-to date w/their latest updates whenever available since sometimes things change fast especially during holidays etc.. My biggest challenge was making sure we were saving money while still meeting our targets set before us every month otherwise sales would suffer hence why am glad u guys helped solve these problems through PRO FFITTCENTER SYSTEMS. !!