Reef octopus - internal vs external

[leon1972]

So first question, is the reef octopus worth the money?
Next question, am I correct in thinking an internal skimmer is in sump and external is a seperate unit that does not sit in sump?
Question three is what are the pros and cons of internal and external skimmer?

 

[ethridge78]

I have a sro 5000sss internal skimmer and I love it but if I had to do it again I would get a external just easier to work on /clean I had it under my 300dd so I was limited on space then I would have more sump room also.

 

[ethridge78]

here is a picture