It's pretty hard for me to give any financial institution a 5 star rating, but I've been to enough and handled enough financial matters that I know that Busey is probably the best around.
I've researched mortgage prices for myself and others numerous times and Busey has, without exception, been the cheapest place in town for the last 10+ years. If you need a home loan I'm not aware of a better option.
I've also held several personal and business accounts at Busey and while I have had problems now and then I know from experience that Busey is more forgiving in most issues than other banks.