Helion & Company books

Dec 2016
I am interested in military history involving 16th century to 19th century. I have read with great interest the following website:

Helion & Company

They have interesting series for me: (1) Century of the soldier (c. 1618 - 1721), (2) From reason to revolution (1721-1815) and (3) From Musket to Maxim (1815-1914). Do you know this publisher? What is your opinion about it?