I own one
It comes down to why this machine of an inkjet.
Is your environment dirty? Summa
Are you print small short run and want accuracy? Pick Summa
Do you require long term signage? Pick Summa
Are you doing large full colour graphics? Toss up, but I would use a roland
(depends on the size)
Small vehicle decals and wraps, summa
Need a very versatile machine.. Summa
Don't want to spend a lot on software? Summa
Do you need to print gold (shiny) or Silver (Summa)
Are you worried about your cost per square foot...Inkjet
Long runs of repeat performance. The Summa works well.
Don't do a lot of printing and the printer is idle... Summa
Print on magnets... Roland I think.
Wraps...Roland
Support... I hear Roland is good but so is Summa
If you are worried about output price, you would do better with a Roland. Laminating is the other factor to put in there. You get 5 years unlaminated with a Summa. You get 3 with a roland.
I am not in the large print market so I chose Summa for the reasons above. However, most of the guys here own a Roland Inkjet. And that has to say something for that machine.