It is one of the best casinos available: because of their experiences, Mainstreet Vegas knows very well about the needs of their players.
They have a very friendly 24/7 customer support. Supported language is English. The casino itself offers more than 90 great casino games, including several Progreesive Jackpots.
Slots Plus USA was launched in 2009 and was especially designed for US players. They also offer several deposit and withdrawal opportunities. Some of them they call "preferred". With the preferred deposit methods players can pick up some additional 15 percent deposit bonuses.
A detailed Slots Plus USA Casino Review can be found here: Slots Plus USA Casino Review.