From what I can tell the Rebel Bottomline is similar (not wishing to offend anyone) to a Inferno.
It comes down to 1) what do you want to do with it (err)
2)And how much can you spend?
1) Do you want to play tourneys or just have your own marker to go to your local site and play rec-ball.
If you want to play tourneys It probably won't stand up to the job (but I have never used one).
If you want to be a rec-baller, then sure it is a good starter marker. (however always try before you buy.)
and 2) If you have a bit of money think second hand you can pick up a good Cocker or Impulse from the classifieds in these forums and it will be a good way to play rec ball and progress up to Tourneys.
Good Luck,
and happy splatting