For "free to download and use" – "completely free" to "totally gratis to access and utilize". Yes, that works.
"Robust" can be "strong", "sturdy", "solid". "Feature set" might be "capability suite", "function package", "tool collection". "User-friendly" could be "easy-to-navigate", "intuitive", "straightforward". "Interface" as "interface", "layout", "design". "Excellent" could be "superb", "top-notch", "first-rate". "Choice" can be "option", "decision", "alternative". "Looking" might be "seeking", "searching for", "in need of". "Reliable" could be "dependable", "trustworthy", "confiable". 360mpgui v1.3.0.1 download
"User-friendly interface" could become "user-friendly interface|intuitive design|straightforward layout". For "free to download and use" – "completely