We stayed at the Del Sol in May of 2014 and didn't find it scary. If they had one of the bigger rooms available this time, we likely would have chosen to stay there again. Now, we don't spend a lot of time in our motel rooms, so we aren't willing/able to pay more for luxury. I would never say it was a nice motel, but it was decent.
We had one of the bunk bed rooms and had enough space for our 12, 10, and infant sons, plus hubby and I. It was clean enough, the breakfast was a typical continental.. not great, but enough to get us through until lunch. They let us take breakfast back to the room to eat while we got ready, which was appreciated. No issues with the hotel staff. Parking was super cramped, which was our biggest complaint. The walk to and especially from DLR was definitely the highlight. Pool was small, but the kids still had fun.
If you are someone that is looking for fancier motels/hotels, this is probably not the place to stay. But, if you are looking for a decent place to sleep that is close to DLR, I think you will likely be fine with the Del Sol. I can't really say anything great about it (aside from the location), but I also don't have much to say that is bad (aside from the cramped parking).