Pretty pleased with it. This has been the biggest thing we have missed in our home. No more spending 20-30 minutes a night doing dishes!!!!! and we got a bunch of a counter space back, that constantly had dirty/clean/drying dishes sitting on it.
Clearly Alfa designed the island to fit a 18" unit, as it just fit perfectly in all dimensions. We did lose the 4 drawers they had installed in the end, but its totally been worth it.
Biggest thing I had to do was take out the double sink, as the 2nd basin didnt clear the top of the dishwasher Tub. I simply patched the counter top with a cutting board. The 18" bar sink was hard to find - not a common size. Actually found it on Amazon believe it or not. If you look closely its obvious the cutting board is a patch, but I think functionally, its pretty darn good. We also get a built in cutting board!
My biggest complaint is the 18" dishwashers are darn expensive. Unless you want a real cheapie, your looking at $200-300 then the equivalent 24"! And they are special order at most big box stores.
Got ours at HD for about $700 OTD.
Anyway, if you have a 5er with an island kitchen, do some measuring, you may be suprised....