Overall in its price range, the SL-90 is hard to beat.
Positive Product Points
Produces good repeatable shots, great steam, well controlled temperatures, heavy-duty internal construction.
Negative Product Points
Smallish portafiller, no 3-way solenoid valve results in "puff" when removing portafiller, long cool down or need to bleed pressure after steaming to produce another shot.
I bought the SL-90 to replace my leaking Krups Semi Commercial Maximo and in almost all aspects has been a great improvement. It heats up quickly and the cup warmer does a much better job than the Krups. Programmed shot sizes is nice. I used the pressurized filters for a while and finally ordered the non-pressured filters from Baratza. I now get adequate creme, but need a better grinder. I am currently using a Saeco MC2002 Burr grinder and I need to upgrade it.
The steaming power of the SL-90 is excellent. After a short warm-up it produces unlimited steam and perfect microfoam. There is a good wait for it to cool down before you can make another shot of espresso unless you bleed the pressure after you steam your milk.
Excellent service from 1st-line and they included espresso pods, thermometer for frothing, steaming pitcher, and a brush to clean the machine.