This review covers both SeniorPeopleMeet and OurTime, which as I understand it share the same database of users.
My biggest complaint isn't with the service, it's with he low quality of the profiles. I'd like to learn something about a woman before I invest time in getting to know her better. I'd like to focus on women that have interests and viewpoints that overlap mine. I'd like to weed out women that are obviously not compatible. Sadly, the profiles reveal almost nothing of the women. Profile after profile says the same thing: "I like to laugh, I like the outdoors..." Even the easy click-on-an-answer questions are often not answered. Consequently, I have proactively contacted very few women because I know virtually nothing significant about any of them.
Conversely, if you think of a profile as just an icebreaker and you just want to meet lots of women regardless of what they are like, then you probably don't care about this.
As for the site itself, it has at least two ways to get you to interact. The main screen will show two women and you can click on which one you like best, based only on a photo. Second, a link to "Today's Matches" will show you a list and you can click Yes or No.
In either case, a positive click will generate a flirt message to that person, a canned sentence from maybe a dozen or so pre-written sentences. When I first signed up I was getting a lot of these canned flirt messages. I thought it odd that none of these women were writing anything themselves. Then I realized that most or all of them are just clicking on my picture and don't even know they're sending a canned message to me.
On a positive note, the few women I have met have been pleasant and I've enjoyed meeting them.