We have a summa F1612, and as a digital cutter it's pretty good, it doesn't take up a huge amount of space, it's quick and very simple to operate. The only downside is the router leaves much to be desired, the software that runs it is very primitive and you can't use regular CNC router software. If you are planning on processing lots of sheet goods, spring for a machine with a table at least as large as your sheets, the 1612 only had a working length of 47", which means there is a lot of advancing, re registering etc and sometimes the cuts don't always line up perfectly.
As an other F1612 owner, I agree 100%.
Pros:
With barcode workflow, you can send down full rolls of media to kiss-cut then through-cut (or any other combination) and walk away
Mostly works well for kiss-cutting or through cutting vinyl, banner, coroplast etc.
Works okay for routing things like sintra and ACM, as long as you keep it in batches of 47" x 47"
Good price point/value for entry level cutter
Cons:
Small bed size is inconvenient for larger jobs, such as 4' x 8' sheets
"Segments" are not accurate and have very limited options to control where/how it breaks up jobs (Are you listening Summa...........you need to add the ability for users to edit where segments are!!)
Routing is very unpredictable.......you can document settings until the cows come home but try to run jobs consistently with those settings and you'll be pulling your hair out
GoProduce software crashes almost daily, and has a ton of bugs
After owning this thing for just over three years, there are days that I'm glad we have it and there are days that I wish we would've gotten something else. Definitely worth considering but make sure your expectations are realistic with this machine. It's not a Zund, but the price also reflects that.