FreeAgent

Avantages: We've been using Freeagent for over 5 years. In that time frame my company has grown from being a sole-trader to an incorporated limited company with employees. To say that Freeagent has helped facilitate that growth would be an understatement. We now use Freeagent for our VAT submission (saving us £200pq accountants fees), Payroll (saving us £10pm per employee), Sending out client estimates/invoices, and what we originally bought it for... Book keeping and accounting. We have Freeagent connected to our bank feeds, meaning we are only ever 24hrs out of date with our live bank accounts. This is now a common practice with similar software, but for us it came just at the right time. Their team of inhouse accountancy experts is also an incredible resource that we use around once a quarter, or whenever something new crops up that we might need some help with. We still use the skill of an account for filing our end of year accounts, but we could even do this with free agent.

Inconvénients: The one thing that has been a niggle like a tiny pebble in your shoe, or scratch on the roof of your mouth, is that you cannot send a remittance! Many people have requested this functionality but it has largely been ignored by the freeagent team. I have no idea whether it is a technical or philosophical reason they've just not engaged with it... If they did implement this functionality it would pretty much make it perfect for my companies needs.

Avantages: Overall experience is good. It allows to better organised both my bookeeping but as well my employee work due to its usability. Love as well the API integration that allow me to create custom analysis.

Inconvénients: Too much focus on UK client. We are an Italian company and some of the functionality available for UK are really complex to achieve for us and required workaround.
Billing only in 1 currency is crazy, why do you have invoice in multiple currency but billing cannot be done? It should be a simple addition to make but it has been year that people asked for this and still not implementation.
Country specific payroll. Although I am aware it will be impossible to enable payroll for every country out of the box why don't allow customer to customized the payroll functionality to meet payroll requirements or add important deadline for taxing purpose.
Even the export functionality can be improve and should be added to every areas from timesheet to bill, from invoice to expense with filter that allow you to specify the data you want to export.
VAT calculation for Intrastat - due to the internationalisation of business should be easier to export only bill and invoice that are related to country outside your normal business area.
What about language package? Again if not possibile provide an LDK that allow client to customize the interface.