I am not sure anyone apart from the builders. In the recent World Commissions on Dam report, such developments were condemned as serving no one except for the builders. The building of road infrastructure is often done to facilitate the export markets. I will not spend anytime discussing the issue of debt as it is beyond the scope of this discussion, but I will state that these loans add to the burden. A burden that again returns us to the cash crops and cheap labour development model that must be adopted to pay off these debts.
Grants are far from free.
They are tied and motivated for the self-interest of the donor nations. I have discussed the purchasing restriction issues, but there is also the issue of long-term dependency as the donor countries are needed to service the purchased goods over the longer term. But there is also the re-structuring of public assets that must occur to receive these grants. The public assets, including natural resources are then open to exploitation. There is another trend that must be acknowledged - aid becoming a business.