Update: After shopping with Ideeli for another year, I've noticed some changes to their 'tactics.' I had my first encounter with a relatively condescending customer service rep. Who answered my questions functionally but seemed to have an attitude. My question was if they shipped items earlier than the estimated shipping date because in my experience, they've tended to do that. The answer I received was "[Name], you've been a regular customer of Ideeli. You know the way it works. Nothing has changed." Actually, a follow-up question I would have had was if they could notify customers if shipments were going to be early (I have random stacked credit). Functionally, it would saved a lot less attitude and characters if the rep had just said "We try to ship around the estimated dates but yes, sometimes." Less typing, you know --- energy conservation.
I think something happened with merchandising as well, they have less interesting designers featured. They've rotated in higher luxury brands like Gucci, Prada, etc but in general - they tend to rotate the same-ish style merchandise that I find not appealing. They've also reduced giving out a $25 credit for items that are out of stock to $10 shipping credit. They removed the discussion pages for sales and instead implemented an instant chat system. These aren't terrible changes, more neutral and one of the positive things is that I do like their home/kitchen/living sales and will probably only check those out.
The bottom line is that, with other flash sale sites gaining a footing with consumers and establishing merchandise audiences it's getting harder to standout and keep people's attentions. Ideeli has maintained a relatively reliable service with shipping items and good billing practices and I've personally never used their travel deals, but they do try to keep it 'interesting.' But for me, it's no longer fun and mostly generic.
In general, I've had decent experiences with Ideeli. Their items have arrived a few days before the estimated shipping dates and the items themselves are definitely new. I've had an order cancelled once because it wasn't available but received a $25 credit. Slightly disappointing but it wasn't a must-have item.
I have had to return dresses 3x, I've ordered 2 dresses each time to compensate for the shipping. The first time the dresses mostly fit, but just wasn't suited to my body shape. The other two times, a brand's manufacturer's chart listed an M as 4-6 but ended up being a bit too big (the next size down, 0-2 wouldn't have made sense since I've never been a 2 even at my thinnest). The other brand had bust, waist and hip measurements which sort of matched mine, but still ended up a bit too large. I'm not sure if the manufacturers aren't competent enough to create an accurate chart, if I don't know my own measurements but I agree that trying on dresses for up to $30 can add up. That being said, the other stuff I've gotten were good deals so it kind of offsets this annoyance but I'd be wary about ordering clothing unless you're relatively sure it'll fit.