The best thing about this software it has all our contacts in one place so we can send bulk emails with ease without having multiple accounts or tools for each client! It also makes billing easy as well which saves us time from sending invoices manually since they get automatically sent out when booked through them instead of separately every month like previous systems did before. Nothing really I dislike too much but sometimes there are bugs here and then everything lags up during peak times until you reboot your computer - not sure why though? Maybe because its running off an older processor?? Sometimes i have issues booking flights using their website if my browser isn't set correctly; however once logged into gem tabs online via chrome works fine!!