I think the best thing with AirTax is the price and the responsiveness timeframes. It's also carried out over email and the staff tend to communicate relatively clearly. I think the bad part about Airtax is that the pricing plans and what not are unclear and the program tries to upsell you to a tier that you may not need. I wish the pricing plans and options and how to choose what you need were more transparent and intuitive. I generally only need the cheapest option but the program and menues set up tries to make me pay for an upgraded tier -- similarly annoying to how on flights they try to make you select a seat and then pay for it, even though you didn't need a specific seat in the first place.