'double' check in
In the past (on the old site) it was possible to check in a new episode when the previous one was watched for about 70% or so. In case you were watching it without commercials, I guess, but now I don't see that option anymore. I was wondering if it broke down because of the move to the new website or if it's coming back at all. Thanks it advance.
Other than that, website looks great and has a nice responsiveness.

The check in restriction has been relaxed to allow this.
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Mark commented
What about giving you the choice of the duration when checking in? While correcting some information about a couple shows I noticed that themoviedb.org allows you to enter multiple durations for a show, so some have 30 mins and 22 mins listed. If trakt pulled in all durations it could allow you to select which duration you'd like to use so that if you're watching it without commercials, e.g. DVR or Netflix, you use the shorter option and if you're stuck watching it live you use the default duration.
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Mad-City Wedge commented
I'd like to second this. I watch most everything through a DVR so I skip commercials meaning most 1 hour long shows take about 45 minutes to watch and 30 minute show about 23 minutes. Sticking true to the actual duration of the show when aired is making watching multiple episodes of the same show or a variety of shows and checking into them very difficult. Just change the calculation for shows to be 70% of the stated length for the check in. Easy fix IMO.