I've been using lmms for over a year now I love the intuitive interface, sounds good, easy to install.
I wish it had an audio capture funtion with an input meter with a basic editor just to trim up audio samples. I believe this would really complete lmms as a DAW. LMMS is so much more end user friendly and better for sequencing percusion.
Rosegarden can only record with jack, to edit audio samples you can select a default editor like rezound, which is great for editing start, stop and loop points. This all works fairly well, but I sometimes wonder if a program could do all of this independent of jack, could it remove a complicated xrunning link of music production chain.
I've been using the virtual keyboard to play the triple osc with my computer keyboard, fun.
All the best,
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