We used Profiles for reporting last year. Generally staff were happy enough with it given that no-one likes change, and our previous (pull data out of SIMS, stick it in Access, generate Word documents, write reports, upload to access then generate report) system was excellent from a user's point of view (though not from a back-room point of view).
What staff didn't like about profiles was the lack of remote access (you can't stick it on a USB stick and take it home) and the fact that assessment info for the same report had to be recorded in an AM7 marksheet. This is better now that "tabbed browsing" has been introduced.
Our biggest sticking point was remote access. Several staff were very unhappy with having to cut and paste from a word document into profiles (disadvantage of moving away from a well established system that staff found easy), some claiming it took a very long time (I just don't get this - though some were struggling on with touch pads rather than using a proper mouse).
So we got involved with a pilot of SLG and tried using that. Because of hosting issues this was very problematic with some staff finding that they could not access SLG fully in the evening before a deadline, but there were also some odd glitches like the profiles edited on SLG coming into SIMS with the wrong font - this was not easy to sort out.
Our impressions from the pilot were that SLG did not give a very attractive or intuitive interface - good enough for staff to use, but not what we would hope for from a good online reporting solution. It may be that SLG can be moulded into a much more appealing system, but we just didn't get that far in this pilot.
We'll probably stick with profiles for this year, but we might be back to cut & paste. We're also looking at PARS + Connect + Insight, but we have a lot of stuff set up in SIMS - particularly AM7 that I don't want to have to set up afresh in PARS.