Recommended with a big asterisk.
Bottom line: if you like CGDCT, yuri, and ecchi, then you will enjoy Slow Start. It is a PG-13 teaser, with enjoyable fan service and lots of yuri flirtations between the characters, especially so between Eiko and her teacher. But there is no nudity, nothing explicit, just a lot of joking and CGDCT.
The plot is minimal. The anime writers and producers let us down, suggesting a number of story lines that just fizzled out before they could get interesting. The art style is sort of classic for CGDCT, and may not be everyone's cup of tea.
I may find myself watching bits of this again someday. Sometimes you just need a little yuri CGDCT to get through the week.
6/10